Perhaps the player hitbox is a little too punishing, I'll look into adjusting it to an appropriate degree. Thankyou for the feedback!
By 'clings to something' do you mean like on the walls? I will also be looking into fixing that and make sliding off of the walls/surfaces more consistent. EDIT: I see what you mean now, the floors have some issues too, I'll do my best to sort that out and test all the ground colliders. Thankyou for reporting the issue! I jump around way too much so I didn't seem to notice much.
Thankyou again for posting, it really helps me moving forward and patching this one up.