Cool stuff! Pretty polished and complete-feeling! @april denise is right with their comment about being overwhelmed. I also didn't find it particularly clear when my tree cannon (the blue one...?) was refilled, and when too many flames came close to me then my heat level would tend to fly up to eight and send me back to my ship without much of an opportunity to apprehend the flames. I really enjoyed my time with the game, though, and I think that with some minor UX tweaks you'll elevate this solid platformer.
Nice use of the assets as well!