Good game. I like the art style, effects. I have some suggestions for you.
- Increase the variety of enemy.
- More items (For example: extra health, immortal for a few seconds,.....).
- Health bar.
If you don't mind, i'd like to introduce my game to you. Check it out.
https://hit-game.itch.io/square-game
Edit: How can i unlock other character? There is no price tag or indicator for the other.