The polish in the main mechanic in terms of sound, camera shake, and general visuals is well done.
The core idea has a lot of promise, I think you should iterate and expand on it to apply it to some kind of context - this game is very abstract but apply it with two characters that join together when shot, let's say, and that could be super cool. Overall I had a lot of fun I just think there could be more to it.
I would love your rating / comments on my game as well to see what I can improve. Thanks for making this.