I liked the game and had fun with it but I thought I'd give a lil bit of feedback: 

Coyote time/ledge tolerance could be helpful. I noticed the jump animation and sound effect play regardless of whether the player can actually jump. Jumping while moving on slopes is a bit weird where jumping while going down can sometimes not even, or barely, register. The last thing I have to say is adding checkpoints, it may just be that I'm bad at platformers (which is very likely) but I did find it frustrating especially on the third level when i finished the lower section and had almost made it back from the top section only to slip and have to start from the beginning which led to me giving up.

Overall though these are just little things and I do think the game itself is really good and i enjoyed playing it, great work!