feat: responsive desing

feat: load api from .env

kittyurl-frontend/src/components/KittyGame.tsx

@@ -243,10 +243,7 @@ export const KittyGame: React.FC<{ onBack: () => void }> = ({ onBack }) => {
                     </div>
                 )}
             </div>
-            <div className="mt-6 flex gap-6 text-slate-300 font-bold uppercase text-xs tracking-[0.2em]">
-                <span>Speed: {Math.round(INITIAL_SPEED + score * SPEED_INCREMENT)} px/s</span>
-                <span>Physics: Delta-Time Based</span>
-            </div>
+            
         </div>
     );
 };