This was an idea for a simple key chain game which tests your reflexes. The LCD screen at the very top displays the time when you are not playing the game. The top roll of colors represent LEDs and the bottom roll represent buttons. When you start the game the LEDs will light up and then a single random LED will stay lit. During this time either "COLO" for color or "POS" for position will be displayed on the LCD screen. If "COLO" is displayed, push the button with the same color of the LED that is lit. If "POS" is displayed, push the button directly under the LED position. The game will speed up faster and faster as it progresses. To start the simulation push [4] to begin. Use [1], [2], and [3] to control the red, green, and yellow buttons.

Prototype with the ATMega328P: