The gameplay is absolutely phenomenal for something made in one week. (I may be slightly addicted) The constant switching of weapons when breaking hearts is challenging, yet never feels very unbalanced or unfair. Even beyond that, the art, music and pretty much everything else is also stellar. If there was a single complaint to think of, it would be the lack of controller support, but that seems like more of a nitpick at that point.
Got a high score of 33 Rounds, 5175 Demons and 139 Hearts on my first run, which I very much intend to beat at some point.
Amazing job, yall!