Game manager

🚗 2048 2 🎮 action 21 ⚽ shooting 5 🏍️ zombie 10 ✈️ survival 12 🔫 arcade 33 🧩 wave-defense 1 🏁 high-score 1 🌟 multiplayer-leaderboard 1 🎯 browser-game 3 🚀 html5 11 ⚔️ casual-gaming 1