Interesting! I like the art style.
I think it's way too slow to begin with given how active the gameplay is though.
Also there's a really annoying bug with the Quit Round button - it doesn't seem to reset the timer for the next round, so the next one ends really fast.
I think to hook people maybe the current direct hit effect should be what happens every impact, and then make the direct hit even better. So there's immediately a lot of visual spectacle and you can upgrade a lot?