This game is really fun

It's a game that makes you watch optional ads, and the system itself keeps you engaged, so I'm steadily leveling up without getting bored. Especially since you have to level up each character, you can destroy the opponent's base (castle) with your preferred characters, eliminate all units, or win or lose based on your contribution to destroying the castle (from 100% to 1%). Castle walls can also be upgraded, allowing for strategic use. This is a screenshot of me being rank 1, and the amount of items received is also decent. It seems worth trying.