https://coffee-sized-games.itch.io/colortorture-rgby

Color Torture: RGBY

Is a short puzzle horror that places you in the shoes of ordinary man Carl. He awakens in a dark, enigmatic room, bound to a chair by unseen devices. His only path to freedom is through a fiendish memory puzzle that will test the limits of his sanity.

The computer game is the focal point of your survival, but it is no ordinary memory game. A brutal and painful death awaits.

Length And Difficulty: There currently exists 20 levels, most players will begin to struggle by level 7. Difficulty is extremely high if using just your mind alone, and victory is unlikely. If you want to win on your first playthrough it's recommended you use a pencil and paper, or have a friend help you. 

NOTE FROM DEVELOPER: Color Torture is still in development and I intend to add extra content and expand features while also fixing nasty bugs. By all means the current state of the game is fully playable and provides a good look at what the future of Color Torture brings.