Rated! This one is super hard, I think the game could benefit from a better explanation of the mechanic, for a while I thought "Right arrow" still meant "Right", but instead all directions are the same, it's just the key used that changes. I'm aware this is explained in the game's description, but I still think a tutorial screen on the menu would make the feature a lot more easy to understand.
Besides that, I really like the amount of polish it has and the minimalistic presentation!