Really stylish and punchy roguelite bullet hell! This fits perfectly with the jam theme and is just an overall great game!
There were some issues I had where I would enter the next room and immediately be hit before I could react, so perhaps a slight delay to enemies or room start time as the player transitions in would be nice. Also, perhaps removing the pickup delay once you clear the room so you don't have to wait around as much. This game could really be a solid release post-jam with more mechanics and polish :) I hope you continue it on!
Good job!