I suggest increasing the main character movement speed, letting it similar to how it is done in Super Mario 64, because the way it is rn is just ultra slow imo. And also, imo, I think it should be able to gain more movement speed while in the air, so if there is a big stair in front of you, you could simply jump and press forward, instead of needing to go back little bit and then running and then jumping. Everything else looks fine.