That's cool ! Zhe only thing I'd say is that we don't really understand why we're hurt but there's probably a reason for that. Overall good, great concept !
I appreciate you playing! The fire that spawns damages your ship health directly, the health upgrade does give you back some health as well as increase your max health, but I definitely could have made it more clear. The tutorial part is something I put together last minute lol. I appreciate the feedback!