I like to think this is also an illustration of the buttons on the controller; 3 red Xs and a black X on the right
what if... B E T H (counter clockwise) buttons (nvm dumb suggestion sorry)
that's kinda like what the Ouya did actually lol (it had O, U, Y, and A buttons)
I may or may not have watched computer clan/crazy ken's video about it some days before commenting that lmao
game cube controller except the big A button is a big X button (also the button is shaped like an X)