I like the art style but I have to say the game feels a little bare. Gameplay wise there's nothing really wrong with it, but the level design is nonexistent which makes it a very same-y experience across levels.
"Exploring" the same area each level just with more leaves/ice doesn't feel like progression or very fun, and the random placement of the fuel and enemies meant there was only one challenge in the entire game: move here, but not there. That along with with the lack of difference in mechanics or ways to interact with the world - even on an aesthetic level like slopes, trees, rocks etc - the game really ended up being one-note.
I found the choice of whether to let go of the sprint button was the only one that could be made in the game as far as playing goes, which I realised early on wasn't a choice at all because moving faster offered no downsides and felt better than walking, with or without the timer.
A good idea but some flaws with the execution - I do think the player being a lighter and the reason for avoiding enemies/environment being that they were flammable was a really good idea, it's definitely worth exploring and playing with!