diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 75d5698..41d9c62 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,11 @@ jobs:
         NODE_OPTIONS: '--max-old-space-size=4096'
         VITE_AUTH0_DOMAIN: ${{ secrets.VITE_AUTH0_DOMAIN }}
         VITE_AUTH0_CLIENT_ID: ${{ secrets.VITE_AUTH0_CLIENT_ID }}
+        VITE_AUTH0_AUDIENCE: ${{ secrets.VITE_AUTH0_AUDIENCE }}
         AUTH0_CLIENT_SECRET: ${{ secrets.AUTH0_CLIENT_SECRET }}
+        VITE_SUPABASE_PROJECT: ${{ secrets.VITE_SUPABASE_PROJECT }}
+        VITE_SUPABASE_KEY: ${{ secrets.VITE_SUPABASE_KEY }}
+        
 
     - name: Extract hostname from package.json
       id: get-hostname
diff --git a/CLAUDE.md b/CLAUDE.md
index 9370101..65226ad 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -144,3 +144,4 @@ public/
 - TypeScript target is ES6 with ESNext modules
 - Vite handles bundling and dev server (though dev mode is disabled per user preference)
 - Inspector can be toggled with 'i' key for debugging (only in development)
+- https://dev.flatearthdefense.com  is local development, it's proxied back to my localhost which is running npm run dev
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 1c054f6..82a9f45 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,6 +18,7 @@
         "@babylonjs/procedural-textures": "8.36.1",
         "@babylonjs/serializers": "8.36.1",
         "@newrelic/browser-agent": "^1.302.0",
+        "@supabase/supabase-js": "^2.84.0",
         "loglevel": "^1.9.2",
         "openai": "4.52.3",
         "svelte-routing": "^2.13.0"
@@ -986,6 +987,85 @@
         "win32"
       ]
     },
+    "node_modules/@supabase/auth-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/auth-js/-/auth-js-2.84.0.tgz",
+      "integrity": "sha512-J6XKbqqg1HQPMfYkAT9BrC8anPpAiifl7qoVLsYhQq5B/dnu/lxab1pabnxtJEsvYG5rwI5HEVEGXMjoQ6Wz2Q==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "2.8.1"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@supabase/functions-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/functions-js/-/functions-js-2.84.0.tgz",
+      "integrity": "sha512-2oY5QBV4py/s64zMlhPEz+4RTdlwxzmfhM1k2xftD2v1DruRZKfoe7Yn9DCz1VondxX8evcvpc2udEIGzHI+VA==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "2.8.1"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@supabase/postgrest-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/postgrest-js/-/postgrest-js-2.84.0.tgz",
+      "integrity": "sha512-oplc/3jfJeVW4F0J8wqywHkjIZvOVHtqzF0RESijepDAv5Dn/LThlGW1ftysoP4+PXVIrnghAbzPHo88fNomPQ==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "2.8.1"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@supabase/realtime-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/realtime-js/-/realtime-js-2.84.0.tgz",
+      "integrity": "sha512-ThqjxiCwWiZAroHnYPmnNl6tZk6jxGcG2a7Hp/3kcolPcMj89kWjUTA3cHmhdIWYsP84fHp8MAQjYWMLf7HEUg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/phoenix": "^1.6.6",
+        "@types/ws": "^8.18.1",
+        "tslib": "2.8.1",
+        "ws": "^8.18.2"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@supabase/storage-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/storage-js/-/storage-js-2.84.0.tgz",
+      "integrity": "sha512-vXvAJ1euCuhryOhC6j60dG8ky+lk0V06ubNo+CbhuoUv+sl39PyY0lc+k+qpQhTk/VcI6SiM0OECLN83+nyJ5A==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "2.8.1"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@supabase/supabase-js": {
+      "version": "2.84.0",
+      "resolved": "https://registry.npmjs.org/@supabase/supabase-js/-/supabase-js-2.84.0.tgz",
+      "integrity": "sha512-byMqYBvb91sx2jcZsdp0qLpmd4Dioe80e4OU/UexXftCkpTcgrkoENXHf5dO8FCSai8SgNeq16BKg10QiDI6xg==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/auth-js": "2.84.0",
+        "@supabase/functions-js": "2.84.0",
+        "@supabase/postgrest-js": "2.84.0",
+        "@supabase/realtime-js": "2.84.0",
+        "@supabase/storage-js": "2.84.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
     "node_modules/@sveltejs/acorn-typescript": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/@sveltejs/acorn-typescript/-/acorn-typescript-1.0.7.tgz",
@@ -1068,6 +1148,12 @@
         "form-data": "^4.0.0"
       }
     },
+    "node_modules/@types/phoenix": {
+      "version": "1.6.6",
+      "resolved": "https://registry.npmjs.org/@types/phoenix/-/phoenix-1.6.6.tgz",
+      "integrity": "sha512-PIzZZlEppgrpoT2QgbnDU+MMzuR6BbCjllj0bM70lWoejMeNJAxCchxnv7J3XFkI8MpygtRpzXrIlmWUBclP5A==",
+      "license": "MIT"
+    },
     "node_modules/@types/react": {
       "version": "19.2.2",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.2.tgz",
@@ -1086,6 +1172,15 @@
         "@types/react": "^19.2.0"
       }
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@xstate/fsm": {
       "version": "1.6.5",
       "resolved": "https://registry.npmjs.org/@xstate/fsm/-/fsm-1.6.5.tgz",
@@ -1779,6 +1874,12 @@
       "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
       "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw=="
     },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "license": "0BSD"
+    },
     "node_modules/tsx": {
       "version": "4.20.6",
       "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.20.6.tgz",
@@ -1937,6 +2038,27 @@
         "webidl-conversions": "^3.0.0"
       }
     },
+    "node_modules/ws": {
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/yaml": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.1.tgz",
diff --git a/package.json b/package.json
index 54a51cb..fb954d5 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     "@babylonjs/procedural-textures": "8.36.1",
     "@babylonjs/serializers": "8.36.1",
     "@newrelic/browser-agent": "^1.302.0",
+    "@supabase/supabase-js": "^2.84.0",
     "loglevel": "^1.9.2",
     "openai": "4.52.3",
     "svelte-routing": "^2.13.0"
diff --git a/src/components/leaderboard/Leaderboard.svelte b/src/components/leaderboard/Leaderboard.svelte
index 8d1006a..b15185e 100644
--- a/src/components/leaderboard/Leaderboard.svelte
+++ b/src/components/leaderboard/Leaderboard.svelte
@@ -3,11 +3,47 @@
   import { Link } from 'svelte-routing';
   import { gameResultsStore } from '../../stores/gameResults';
   import type { GameResult } from '../../services/gameResultsService';
+  import { CloudLeaderboardService, type CloudLeaderboardEntry } from '../../services/cloudLeaderboardService';
   import { formatStars } from '../../game/scoreCalculator';
 
+  // View toggle: 'local' or 'cloud'
+  let activeView: 'local' | 'cloud' = 'cloud';
+  let cloudResults: CloudLeaderboardEntry[] = [];
+  let cloudLoading = false;
+  let cloudError = '';
+
+  // Check if cloud is available
+  const cloudService = CloudLeaderboardService.getInstance();
+  const cloudAvailable = cloudService.isAvailable();
+
+  // Load cloud leaderboard
+  async function loadCloudLeaderboard() {
+    cloudLoading = true;
+    cloudError = '';
+    try {
+      cloudResults = await cloudService.getGlobalLeaderboard(20);
+    } catch (error) {
+      cloudError = 'Failed to load cloud leaderboard';
+      console.error('[Leaderboard] Cloud load error:', error);
+    } finally {
+      cloudLoading = false;
+    }
+  }
+
+  // Switch view
+  function setView(view: 'local' | 'cloud') {
+    activeView = view;
+    if (view === 'cloud' && cloudResults.length === 0 && !cloudLoading) {
+      loadCloudLeaderboard();
+    }
+  }
+
   // Refresh data on mount
   onMount(() => {
     gameResultsStore.refresh();
+    if (cloudAvailable && activeView === 'cloud') {
+      loadCloudLeaderboard();
+    }
   });
 
   // Format time as MM:SS
@@ -28,18 +64,37 @@
   }
 
   // Get color for end reason badge
-  function getEndReasonColor(result: GameResult): string {
-    if (result.endReason === 'victory') return '#4ade80';
-    if (result.endReason === 'death') return '#ef4444';
+  function getEndReasonColor(endReason: string): string {
+    if (endReason === 'victory') return '#4ade80';
+    if (endReason === 'death') return '#ef4444';
     return '#f59e0b'; // stranded
   }
 
-  // Get emoji for end reason
-  function getEndReasonEmoji(result: GameResult): string {
-    if (result.endReason === 'victory') return '';
-    if (result.endReason === 'death') return '';
-    return '';
+  // Normalize cloud entry to match local result shape for display
+  function normalizeCloudEntry(entry: CloudLeaderboardEntry): GameResult {
+    return {
+      id: entry.id,
+      timestamp: new Date(entry.created_at).getTime(),
+      playerName: entry.player_name,
+      levelId: entry.level_id,
+      levelName: entry.level_name,
+      completed: entry.completed,
+      endReason: entry.end_reason as 'victory' | 'death' | 'stranded',
+      gameTimeSeconds: entry.game_time_seconds,
+      asteroidsDestroyed: entry.asteroids_destroyed,
+      totalAsteroids: entry.total_asteroids,
+      accuracy: entry.accuracy,
+      hullDamageTaken: entry.hull_damage_taken,
+      fuelConsumed: entry.fuel_consumed,
+      finalScore: entry.final_score,
+      starRating: entry.star_rating
+    };
   }
+
+  // Get current results based on active view
+  $: displayResults = activeView === 'cloud'
+    ? cloudResults.map(normalizeCloudEntry)
+    : $gameResultsStore;
 </script>
 
 <div class="editor-container">
@@ -48,8 +103,37 @@
   <h1>Leaderboard</h1>
   <p class="subtitle">Top 20 High Scores</p>
 
+  <!-- View Toggle -->
+  {#if cloudAvailable}
+    <div class="view-toggle">
+      <button
+        class="toggle-btn"
+        class:active={activeView === 'cloud'}
+        on:click={() => setView('cloud')}
+      >
+        Global
+      </button>
+      <button
+        class="toggle-btn"
+        class:active={activeView === 'local'}
+        on:click={() => setView('local')}
+      >
+        Local
+      </button>
+    </div>
+  {/if}
+
   <div class="leaderboard-wrapper">
-    {#if $gameResultsStore.length === 0}
+    {#if cloudLoading && activeView === 'cloud'}
+      <div class="no-results">
+        <p>Loading global leaderboard...</p>
+      </div>
+    {:else if cloudError && activeView === 'cloud'}
+      <div class="no-results">
+        <p>{cloudError}</p>
+        <button class="retry-btn" on:click={loadCloudLeaderboard}>Retry</button>
+      </div>
+    {:else if displayResults.length === 0}
       <div class="no-results">
         <p>No game results yet!</p>
         <p class="muted">Play a level to see your scores here.</p>
@@ -69,7 +153,7 @@
           </tr>
         </thead>
         <tbody>
-          {#each $gameResultsStore as result, i}
+          {#each displayResults as result, i}
             <tr class:victory={result.completed}>
               <td class="rank-col">
                 <span class="rank-badge" class:gold={i === 0} class:silver={i === 1} class:bronze={i === 2}>
@@ -86,8 +170,8 @@
                 <span class="star-count">{result.starRating}/12</span>
               </td>
               <td class="result-col">
-                <span class="result-badge" style="background-color: {getEndReasonColor(result)}">
-                  {getEndReasonEmoji(result)} {result.endReason}
+                <span class="result-badge" style="background-color: {getEndReasonColor(result.endReason)}">
+                  {result.endReason}
                 </span>
               </td>
               <td class="time-col">{formatTime(result.gameTimeSeconds)}</td>
@@ -100,11 +184,60 @@
   </div>
 
   <div class="leaderboard-footer">
-    <p class="muted">Showing top 20 scores sorted by highest score</p>
+    <p class="muted">
+      {#if activeView === 'cloud'}
+        Showing top 20 global scores
+      {:else}
+        Showing top 20 local scores (this device only)
+      {/if}
+    </p>
   </div>
 </div>
 
 <style>
+  .view-toggle {
+    display: flex;
+    justify-content: center;
+    gap: var(--space-sm, 8px);
+    margin-top: var(--space-lg, 24px);
+  }
+
+  .toggle-btn {
+    padding: var(--space-sm, 8px) var(--space-xl, 32px);
+    border: 1px solid rgba(255, 255, 255, 0.3);
+    background: rgba(255, 255, 255, 0.1);
+    color: var(--color-text-secondary, #e8e8e8);
+    border-radius: var(--radius-md, 6px);
+    cursor: pointer;
+    font-size: var(--font-size-sm, 0.9rem);
+    transition: all var(--transition-fast, 0.2s ease);
+  }
+
+  .toggle-btn:hover {
+    background: rgba(255, 255, 255, 0.2);
+  }
+
+  .toggle-btn.active {
+    background: var(--color-primary, #4f46e5);
+    border-color: var(--color-primary, #4f46e5);
+    color: white;
+  }
+
+  .retry-btn {
+    margin-top: var(--space-md, 16px);
+    padding: var(--space-sm, 8px) var(--space-lg, 24px);
+    background: var(--color-primary, #4f46e5);
+    color: white;
+    border: none;
+    border-radius: var(--radius-md, 6px);
+    cursor: pointer;
+    font-size: var(--font-size-sm, 0.9rem);
+  }
+
+  .retry-btn:hover {
+    opacity: 0.9;
+  }
+
   .leaderboard-wrapper {
     background: var(--color-bg-card, rgba(20, 20, 40, 0.9));
     border: 1px solid var(--color-border-default, rgba(255, 255, 255, 0.2));
diff --git a/src/services/authService.ts b/src/services/authService.ts
index 1e85ab6..48f8bc6 100644
--- a/src/services/authService.ts
+++ b/src/services/authService.ts
@@ -42,11 +42,13 @@ export class AuthService {
         }
 
         console.log('[AuthService] Creating Auth0 client...');
+        const audience = import.meta.env.VITE_AUTH0_AUDIENCE;
         this._client = await createAuth0Client({
             domain,
             clientId,
             authorizationParams: {
-                redirect_uri: window.location.origin
+                redirect_uri: window.location.origin,
+                audience: audience || undefined
             },
             cacheLocation: 'localstorage', // Persist tokens across page reloads
             useRefreshTokens: true // Enable silent token refresh
diff --git a/src/services/cloudLeaderboardService.ts b/src/services/cloudLeaderboardService.ts
new file mode 100644
index 0000000..e343d26
--- /dev/null
+++ b/src/services/cloudLeaderboardService.ts
@@ -0,0 +1,195 @@
+import { SupabaseService } from './supabaseService';
+import { AuthService } from './authService';
+import type { GameResult } from './gameResultsService';
+
+/**
+ * Represents a leaderboard entry from Supabase
+ */
+export interface CloudLeaderboardEntry {
+    id: string;
+    user_id: string;
+    player_name: string;
+    level_id: string;
+    level_name: string;
+    completed: boolean;
+    end_reason: string;
+    game_time_seconds: number;
+    asteroids_destroyed: number;
+    total_asteroids: number;
+    accuracy: number;
+    hull_damage_taken: number;
+    fuel_consumed: number;
+    final_score: number;
+    star_rating: number;
+    created_at: string;
+}
+
+/**
+ * Service for interacting with the cloud-based leaderboard via Supabase
+ */
+export class CloudLeaderboardService {
+    private static _instance: CloudLeaderboardService;
+
+    private constructor() {}
+
+    /**
+     * Get the singleton instance
+     */
+    public static getInstance(): CloudLeaderboardService {
+        if (!CloudLeaderboardService._instance) {
+            CloudLeaderboardService._instance = new CloudLeaderboardService();
+        }
+        return CloudLeaderboardService._instance;
+    }
+
+    /**
+     * Check if cloud leaderboard is available
+     */
+    public isAvailable(): boolean {
+        return SupabaseService.getInstance().isConfigured();
+    }
+
+    /**
+     * Submit a game result to the cloud leaderboard
+     * Requires authenticated user
+     */
+    public async submitScore(result: GameResult): Promise<boolean> {
+        const supabase = SupabaseService.getInstance();
+
+        if (!supabase.isConfigured()) {
+            console.warn('[CloudLeaderboardService] Supabase not configured');
+            return false;
+        }
+
+        // Get user ID from Auth0
+        const authService = AuthService.getInstance();
+        const user = authService.getUser();
+
+        if (!user?.sub) {
+            console.warn('[CloudLeaderboardService] No user sub claim - user not logged in');
+            return false;
+        }
+
+        console.log('[CloudLeaderboardService] Submitting score for user:', user.sub);
+
+        // Get authenticated client for insert (requires RLS)
+        const client = await supabase.getAuthenticatedClient();
+        if (!client) {
+            console.warn('[CloudLeaderboardService] Not authenticated - cannot submit score');
+            return false;
+        }
+
+        const entry = {
+            user_id: user.sub,
+            player_name: result.playerName,
+            level_id: result.levelId,
+            level_name: result.levelName,
+            completed: result.completed,
+            end_reason: result.endReason,
+            game_time_seconds: result.gameTimeSeconds,
+            asteroids_destroyed: result.asteroidsDestroyed,
+            total_asteroids: result.totalAsteroids,
+            accuracy: result.accuracy,
+            hull_damage_taken: result.hullDamageTaken,
+            fuel_consumed: result.fuelConsumed,
+            final_score: result.finalScore,
+            star_rating: result.starRating
+        };
+
+        console.log('[CloudLeaderboardService] Inserting entry:', entry);
+
+        const { data, error } = await client
+            .from('leaderboard')
+            .insert(entry)
+            .select();
+
+        if (error) {
+            console.error('[CloudLeaderboardService] Failed to submit score:', error);
+            console.error('[CloudLeaderboardService] Error details:', JSON.stringify(error, null, 2));
+            return false;
+        }
+
+        console.log('[CloudLeaderboardService] Score submitted successfully:', data);
+        return true;
+    }
+
+    /**
+     * Fetch the global leaderboard (top scores across all players)
+     */
+    public async getGlobalLeaderboard(limit: number = 20): Promise<CloudLeaderboardEntry[]> {
+        const supabase = SupabaseService.getInstance();
+        const client = supabase.getClient();
+
+        if (!client) {
+            console.warn('[CloudLeaderboardService] Supabase not configured');
+            return [];
+        }
+
+        const { data, error } = await client
+            .from('leaderboard')
+            .select('*')
+            .order('final_score', { ascending: false })
+            .limit(limit);
+
+        if (error) {
+            console.error('[CloudLeaderboardService] Failed to fetch leaderboard:', error);
+            return [];
+        }
+
+        return data || [];
+    }
+
+    /**
+     * Fetch a user's personal scores
+     */
+    public async getUserScores(userId: string, limit: number = 10): Promise<CloudLeaderboardEntry[]> {
+        const supabase = SupabaseService.getInstance();
+        const client = supabase.getClient();
+
+        if (!client) {
+            console.warn('[CloudLeaderboardService] Supabase not configured');
+            return [];
+        }
+
+        const { data, error } = await client
+            .from('leaderboard')
+            .select('*')
+            .eq('user_id', userId)
+            .order('final_score', { ascending: false })
+            .limit(limit);
+
+        if (error) {
+            console.error('[CloudLeaderboardService] Failed to fetch user scores:', error);
+            return [];
+        }
+
+        return data || [];
+    }
+
+    /**
+     * Fetch leaderboard for a specific level
+     */
+    public async getLevelLeaderboard(levelId: string, limit: number = 20): Promise<CloudLeaderboardEntry[]> {
+        const supabase = SupabaseService.getInstance();
+        const client = supabase.getClient();
+
+        if (!client) {
+            console.warn('[CloudLeaderboardService] Supabase not configured');
+            return [];
+        }
+
+        const { data, error } = await client
+            .from('leaderboard')
+            .select('*')
+            .eq('level_id', levelId)
+            .order('final_score', { ascending: false })
+            .limit(limit);
+
+        if (error) {
+            console.error('[CloudLeaderboardService] Failed to fetch level leaderboard:', error);
+            return [];
+        }
+
+        return data || [];
+    }
+}
diff --git a/src/services/gameResultsService.ts b/src/services/gameResultsService.ts
index a619b13..a0103a2 100644
--- a/src/services/gameResultsService.ts
+++ b/src/services/gameResultsService.ts
@@ -1,4 +1,5 @@
 import { AuthService } from './authService';
+import { CloudLeaderboardService } from './cloudLeaderboardService';
 import { GameStats } from '../game/gameStats';
 import { Scoreboard } from '../ui/hud/scoreboard';
 import debugLog from '../core/debug';
@@ -50,7 +51,7 @@ export class GameResultsService {
     }
 
     /**
-     * Save a game result to storage
+     * Save a game result to storage (local + cloud)
      */
     public saveResult(result: GameResult): void {
         console.log('[GameResultsService] saveResult called with:', result);
@@ -60,6 +61,29 @@ export class GameResultsService {
         this.saveToStorage(results);
         console.log('[GameResultsService] Saved result:', result.id, result.finalScore);
         debugLog('[GameResultsService] Saved result:', result.id, result.finalScore);
+
+        // Submit to cloud leaderboard (non-blocking)
+        this.submitToCloud(result);
+    }
+
+    /**
+     * Submit result to cloud leaderboard (async, non-blocking)
+     */
+    private async submitToCloud(result: GameResult): Promise<void> {
+        try {
+            const cloudService = CloudLeaderboardService.getInstance();
+            if (cloudService.isAvailable()) {
+                const success = await cloudService.submitScore(result);
+                if (success) {
+                    console.log('[GameResultsService] Cloud submission successful');
+                } else {
+                    console.log('[GameResultsService] Cloud submission skipped (not authenticated or failed)');
+                }
+            }
+        } catch (error) {
+            // Don't let cloud failures affect local save
+            console.warn('[GameResultsService] Cloud submission error:', error);
+        }
     }
 
     /**
diff --git a/src/services/supabaseService.ts b/src/services/supabaseService.ts
new file mode 100644
index 0000000..3369020
--- /dev/null
+++ b/src/services/supabaseService.ts
@@ -0,0 +1,93 @@
+import { createClient, SupabaseClient } from '@supabase/supabase-js';
+import { AuthService } from './authService';
+
+const SUPABASE_URL = import.meta.env.VITE_SUPABASE_PROJECT;
+const SUPABASE_ANON_KEY = import.meta.env.VITE_SUPABASE_KEY;
+
+/**
+ * Singleton service for managing Supabase client
+ * Integrates with Auth0 JWT tokens for authenticated requests
+ */
+export class SupabaseService {
+    private static _instance: SupabaseService;
+    private _client: SupabaseClient | null = null;
+    private _authenticatedClient: SupabaseClient | null = null;
+
+    private constructor() {
+        if (SUPABASE_URL && SUPABASE_ANON_KEY) {
+            this._client = createClient(SUPABASE_URL, SUPABASE_ANON_KEY);
+        } else {
+            console.warn('[SupabaseService] Supabase not configured - cloud features disabled');
+        }
+    }
+
+    /**
+     * Get the singleton instance
+     */
+    public static getInstance(): SupabaseService {
+        if (!SupabaseService._instance) {
+            SupabaseService._instance = new SupabaseService();
+        }
+        return SupabaseService._instance;
+    }
+
+    /**
+     * Check if Supabase is configured
+     */
+    public isConfigured(): boolean {
+        return this._client !== null;
+    }
+
+    /**
+     * Get the base Supabase client (for unauthenticated requests like reading leaderboard)
+     */
+    public getClient(): SupabaseClient | null {
+        return this._client;
+    }
+
+    /**
+     * Get an authenticated Supabase client using Auth0 JWT token
+     * Creates a new client instance with the token in headers
+     */
+    public async getAuthenticatedClient(): Promise<SupabaseClient | null> {
+        if (!SUPABASE_URL || !SUPABASE_ANON_KEY) {
+            console.warn('[SupabaseService] Missing Supabase URL or key');
+            return null;
+        }
+
+        const authService = AuthService.getInstance();
+        const token = await authService.getAccessToken();
+
+        if (!token) {
+            console.warn('[SupabaseService] No auth token available');
+            return null;
+        }
+
+        console.log('[SupabaseService] Got Auth0 token, length:', token.length);
+
+        // Debug: decode JWT to see claims (without verification)
+        try {
+            const payload = JSON.parse(atob(token.split('.')[1]));
+            console.log('[SupabaseService] Token claims:', {
+                iss: payload.iss,
+                sub: payload.sub,
+                aud: payload.aud,
+                exp: payload.exp,
+                role: payload.role
+            });
+        } catch (e) {
+            console.warn('[SupabaseService] Could not decode token');
+        }
+
+        // Create a new client with the Auth0 token for RLS
+        this._authenticatedClient = createClient(SUPABASE_URL, SUPABASE_ANON_KEY, {
+            global: {
+                headers: {
+                    Authorization: `Bearer ${token}`
+                }
+            }
+        });
+
+        return this._authenticatedClient;
+    }
+}
diff --git a/vite.config.ts b/vite.config.ts
index abdacb0..ae398b5 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -29,6 +29,7 @@ export default defineConfig({
             '@babylonjs/core',
             '@babylonjs/loaders',
             '@babylonjs/havok',
+            '@babylonjs/materials',
             '@babylonjs/procedural-textures',
             '@babylonjs/procedural-textures/fireProceduralTexture'
         ],