Use W, A, S, D to jump, move left, move right, and crouch, respectively. Use J to make Fabio swing a hammer, and L and to make Fabio move left and right faster when uncrouched.
Music mastered by Dj Cutman for release on GameChops. Link to original full soundtrack/music: https://www.youtube.com/watch?v=2DVpys50LVE