Thanks! The game is definitely hard- I should have saved time for someone else to playtest (Supahermes, the other guy who worked on this, only got to try the complete thing once it was submitted, and he couldn't finish it either). I've played almost exclusively platformers (also a White Palace fan in Hollow Knight), so that probably affected my idea of how hard it is.
The game is really short- I can finish it in about a minute and a half usually. However, the amount of punishment makes it take way longer than that if I mess up. I think that "lots of punishment" and "precision platformer" don't go together so well...
Having the fires serve as checkpoints is a good idea!