This was really good. It was strange to me that everyone's heart was on the exact same beat, but that made it easier to get "combos". I also like that even though you have to buy upgrades to get stronger, there was still an end to the game.
Thanks for playing and for your feedback, I agree that it's a bit strange they all have the same beat, it only occurred to me afterwards how simple it would've been to offset the beat at least between each different npc. And I like the idea of a combo counter too!