On your game-page here in itch, in the top left you have a dashboard where there is a "Edit Game" button that allows you to update the description of the game so it says Z instead of X. Probably smart to change there so people figure out how to play the game.
Very creative idea, a bit janky but hey! It's a gamejam for us beginners :). Really liked the idea, and the music was nice but could have been longer - got quite repetitive when trying to figure out how to finish each level.