Pretty addictive roguelike, doing combos feel and cleaning the whole board at once feels so satisfying. Balance-wise, I feel like the “multiple kills” upgrades are a bit too strong due to their lack of cooldown (second run I did was a mostly “multiple kills” build and I was able to chain multiple kills with no issues after a bit).
I don’t know if you’ve planned to continue this, but it could make for a good 3-5$ game with just a bit more enemies and upgrades.