[codeyperson]

Cool game mechanic, I haven't seen anything quite like it.

I think you could remove the UI options at the bottom entirely.

Instead have the user click on the adjacent squares directly. Basically if I click a red square on the board, that would be equivalent to selecting the red square in the UI options.

Then add have a hover state that indicates what is going to happen after they click. And make everything bigger such that so the user can't avoid mousing over the squares. If the hover state is good enough, it should teach the rules without the need for instruction.

Oh and make the color blind option the default / ditch the squares. The emojis look cooler.