If you like tower defense games, then you should definitely check out Kingdom Castle. It's one of the best tower defense games that you can play on your mobile devices. It's a game in which players need to protect their castles from hordes of monsters. And in order to protect their castles, they need to build a strong defense, upgrade their heroes, and create a solid strategy. The game consists of multiple rounds. 

In each round, players will need to protect their castles from the onslaught of enemies. They will be rewarded with gold and gems for defeating a wave of enemies. And with the help of these gold, players will be able to purchase upgrades to their castles and their heroes.

Your goal is to grow your castle as fast as possible before your enemies rush and attack your kingdom. You have to build the defense strategy to fend off the incoming enemy attacks.