The mechanic is an interesting use of the theme, but the control scheme is really awkward. I feel like I need an extra hand to play this. Why not go for something like arrows for movement and Z/X to jump/switch?
Sorry about the controls. The setup just feels nature for me. I know Z/X is kind of standard. I really should start having the Arrow keys and Z/X as a back up if they aren't being used for other functions.