This is off to a great start! The slippery physics may deter some players but that's just a matter of preference. There are a few rough spots for me: the hitboxes on the swinging blades feel a bit extreme, the walljump could maybe use a few extra grace frames, and and I personally don't like when holding the jump button gives you another jump everytime you land instead of requiring a fresh press. I think that last one, in combo with variable jump height, made for a few frustrating spots like the disappearing platform level, where it was easy to accidentally hold the jump a few frames too long and get a short hop that doomed you to death.
Despite the critiques it was definitely fun to play. I found a couple of teleport bugs (which I was excited about, tbh); one when jumping into the side of a moving platform, and the other when standing next to a sliding tunnel and pressing (towards tunnel wall -> down -> away from tunnel wall).
Excited to see more!