Thanks for your detailed feedback :) Yep I totally understand that the rooms feel repetitive, I would have loved to add more enemies and varieties to the room, but did not have the time for that :( I scoped a bit too big for this one.
Hitboxes could definitely be more polished and have more feedback. There is actually a nasty bug that I didn't catch before submission: when you kill a crab or a bee, its collision shape is still running as long as its death animation is not finished. This means you sometime lose HP when you run on dying enemies, which is a really bad :(