Add gameover and overall layout

Co-authored-by: Copilot <copilot@github.com>

src/game/constants.js

@@ -5,7 +5,8 @@ export const GAME_COLORS = {
     movingPlat: '#4cc9f0',
     springPlat: '#80ed99',
     oneTimePlat: '#e76f51',
-    startingPlat: '#f4a261' };
+    startingPlat: '#f4a261' 
+};
 
 export const PLATFORMS_GAP = 80;
 export const PLATFORM_WIDHT = 70;
@@ -17,5 +18,3 @@ export const PLAT_TYPE = {
     SPRING: 'spring',
     ONE_TIME: 'one-time'
 };
-
-