feat: Implement pixel-art rendering with new level loading, tile maps, palettes, and pixel fonts, alongside a game over screen.

src/core/Palette.js

@@ -0,0 +1,27 @@
+/**
+ * Limited 7-color palette for the game
+ */
+export const Palette = {
+  WHITE: '#ffffff',       // Highlights, UI Text
+  CYAN: '#0ce6f2',        // Energy, Slime core
+  SKY_BLUE: '#0098db',    // Water, Friendly elements
+  ROYAL_BLUE: '#1e579c',  // Shadows, Depth
+  DARK_BLUE: '#203562',   // Walls, Obstacles
+  DARKER_BLUE: '#252446', // Background details
+  VOID: '#201533',        // Void, Deep Background
+
+  /**
+       * Get all colors as an array
+       */
+  getAll() {
+    return [
+      this.WHITE,
+      this.CYAN,
+      this.SKY_BLUE,
+      this.ROYAL_BLUE,
+      this.DARK_BLUE,
+      this.DARKER_BLUE,
+      this.VOID
+    ];
+  }
+};