Consider a Rubik's cube like puzzle that starts all black.<p>As you scramble it, you introduce colors in 1-bit RGB.<p>In particular, two opposite faces of the cube have the letter R on them, two opposite faces have the letter G on them, and two opposite faces have the letter B on them.<p>These letters are put on the center square of each face.<p>You can rotate just like with a Rubik's Cube. You can also tap a face to toggle the color bit indicated by the letter on the face.<p>For example, tapping on a face with R would toggle the red bit on all the "stickers" on that face.<p>To solve the puzzle, you need to get it back to all black.<p>Do you think this would make an interesting puzzle?