Hey yoyo!
I really liked your game concept - it reminded me of my game with a RgitBody2D bouncing around an arena, but in this case in a Legend of Zelda like dungeon moving between rooms. I also thought it was cool that enemies could travel between rooms.
I think shots should be available to use more frequently. I THINK you can only fling yourself when you aren't moving (or very close to it). But there were too many times I hit some enemies and wanted to finish them off, but had to bounce around which could take a long time of inactivity.
Case in point: I got softlocked in this room (I was there for a long time bouncing left to right and couldn't get myself free). because I kept bouncing between two areas pushing me left and right.