https://adamsimmersive.itch.io/only-once-emoji-reverse-memory-game

Mobile-friendly. The goal is to touch each emoji tile exactly one time, keeping in your memory the ones already found. The grid enlarges every other level, from 2×2 up to 12×12.

New emoji are continually added to the mix, and it’s a scavenger hunt to find them! There’s no time pressure, so take as long as you like.

Your skill is likely to improve rapidly with repeated plays!