The character controller physics here are interesting. Normally it would feel weird to be this slippery, but to me it feels pretty good. A suggestion might be to add a little bit better coyote time/input buffering for the jumps, because it was pretty easy to slide off of platforms accidentally.
The art style is great to look at, especially those drawings in the opening cutscene. Also a big fan of the slide animation when you slow down, that's a really nice touch. The background parallax effect is really cool as well, nice job!
Another improvement you could make would be adding feedback for health/damage taken. It was a little annoying to teleport all the way back to the fire checkpoint after getting hit and not knowing how much vitality the character had left.
Nitpicks aside, this was really fun to play! Thanks so much for making it!