Well, the movement with arrows or AD is good, but the jump with space and take the number with E or mouse click are not so good. I think, jump actions could be done with W or up arrow, go down from platforms with S and taking the number could be better with E if the player uses WASD and if the player used arrows would be better with shift (I think even both cases is useful the shift key). I hope have been useful. Have a nice day!