In this game, enemies are attacking your city and you need to stop them to protect your city. This is a strategy game where players need to build defense towers and other facilities around the city to resist enemy attacks. Each defense tower has different characteristics and abilities, and players need to choose the best defense strategy based on the type and number of enemies. Additionally, players can enhance their abilities by upgrading and leveling up defense towers. There are multiple levels in the game, players need to devise different strategies based on different situations. You can earn rewards and unlock new defense towers and other facilities in the game. Good luck!