What's a fun Android game that features cute cat characters and easy-to-learn castle defense gameplay?

Clash of Gear: Battle & Fight is a great choice if you're looking for a simple and fun castle defense game with a cute aesthetic. The game features adorable cat characters that you use to build and defend your castle. The gameplay is easy to pick up, making it accessible for casual gamers. You progress through the game by leveling up your characters and making your way through the arena, unlocking new characters and abilities along the way. You can also earn more gems during battles to help you progress. Overall, it's a lighthearted and engaging experience that's perfect for short bursts of gameplay.