Optimize Web Game Performance

I need to improve the performance of my web game, "Công Thành Xưng Đế", especially during peak player activity. The game currently experiences lag when many players are online, and when auto-click is used.

Key areas to address are:
- Optimize server load to reduce lag
- Tweak game mechanics to prevent crashes
- Adjust in-game rewards, e.g., adding gold after conquering cities

Ideal skills include:
- Strong background in web game development
- Experience with server optimization
- Familiarity with game mechanics and reward systems

Please provide examples of similar work done.