What worked:
I really love the art for this game. It actually looks as if I'm walking across the pages of a comic book. It reminds me a bit of Comix Zone. I like the objects interacting with your burns. I would have loved to see this expanded on with more objects being used, but of course with jam constraints it's only the one level.
What didn't:
I do think the ashes disappear a bit too quickly. I never felt that I got the full usage from my burns.
I think the enemies could be improved. I like the idea of sneaking around them, and I like that they drain your resources by erasing your burn trail. I don't like how the only direct way to deal with them is to hit them a bunch draining resources. I'm not sure what you could do, but something else would work better than hitting them over and over again with a burn trail. (something with the environment maybe?)
Bugs:
Level is not properly reset on death and restart.
Great job!