The movement needs a lot more work. You can stop on the wall and even go backkwards as long as you hold A or D. The air movement doesn't really have much momentum to it as you can change the direction at will. When you get the green jump boost platform you can't really control the character because it gets crazy floaty with any movement.
Overall it's okay for a game jam. Movement generally takes a lot of time to get right, especially for a game based purely around it. The audio is fairly good.