Fun game! I love the music. Reminded me of being in a Final Fantasy VIII dungeon. I was aiming for the ! at first (and for a while lol) but I don't think that's the biggest issue because you very quickly learn that it generates enemies and that the enemies deal damage.
EDIT: After looking at the other comments, I didn't realize there was more than avoiding and that I could shoot too. Agree that the particles and death animation are really well done!