I thought your art style and sound direction were dead on for the retro-GBC look. I have never played a bullet hell or survivor-like so I was very confused about what to do lol I liked that it was multi-player, and I thought the two options for characters were charming.
My only feedback I can offer is an optional tutorial for dinosaurs like me who haven't played these types of games before. The writing was also quite difficult to read.
You have a great start here! The game is cute, the multiplayer is a lovely addition and you clearly know what you're doing. <3