I like:
- visual style; imo it's nice and simplistic (which i like:)
- the effect when hit!
Optional suggestion:
- maybe some sound effects? It looks like you're using Godot, and if u are, i recommend "Ez Sfx and Musi" aswell as Kenney's sounds, which both can be found in the assets lib! (I uploaded the later, tho all other credit goes to kenney.nl;)