Consider a Rubik's Cube like puzzle that starts out all black. As you scramble it, you introduce colors.

In particular, each side has a distinct color associated with its center square, which is indicated by a letter on the center square: B for blue, G for green, Y for yellow, O for orange, R for red, and W for white.

You can rotate just like with a Rubik's Cube. You can also tap a face to toggle the color on that face as indicated by the letter on the face as follows: black "stickers" turn to that color and "stickers" of that color turn to black.

For example, tapping on a face with R would toggle the red stickers to black and the black stickers to red on that face. (Stickers that are not black or red are unchanged.)

To solve the puzzle, you need to get it back to all black.

BTW, Gemini is good enough to code this puzzle as a single web page, so you can try it out like that.