This is a simple and substantial tower defense game
1. Build your base to resist enemy attacks
2. Defeat the enemy and obtain resources
3. Bullets will be consumed
4. Trading to obtain necessary materials
5. Upgrade skills to become stronger
6. Complete limited time quests to learn more about game and quickly access resources
7. Adjust the difficulty so you can play the game at your pace
8. Multiple weapons, warriors, ammunitions, strengthens, and options