I think it is a cute game, but for me personally, I don't really like the slippery controls. For a game about precision movement I feel like it should be a bit snappier. I've walked next to a spike, only for the character to keep sliding into it.
I also do not like how holding the jump key causes the character to keep jumping, I think for a game like this it would work better if you had to press the key again, I don't know. The only reason I bring this up, is because I've accidentally hit my head on spikes because the character keeps jumping when I didn't expect them to.
Just my personally preferences though, so take it with a grain of salt.
Keep up the good work.