Cule little game! It's rare to see a pico-8 game, and I really enjoyed the "classic arcade shooter" atmosphere =). The visuals are great, the sound design is simple, but it doesn't need anything more, and the controls feel very good ^^. That's a nice little bullet hell game that felt enjoyable to play!
My only nitpick is that I don't really think it fits the theme that well. I mean, yeah, "nothing can go wrong" because if bullets hits you, you lose health and die. But this is just a normal game mechanic. If the theme didn't exist, I feel like it wouldn't have changed the game.
Other than that, I enjoyed my time on your game, congratulations =)