A great, bite-sized game with a solid central mechanic (I might be biased as a fan of bouncing bullets :p)! I would love to see this expanded upon with more enemy types or difficulty progression. But great start!
Tbh, as of difficulty, the ghosts get faster over time, but the transition is smooth and unrecognised. but still, I was thinking to continue the game after the jam, and a new kind of ghost was in my plans, but I kinda sorta didn't have time on the weekend, so I just... Didn't.