Dominant Amber is a simple game by Wickeycolumbus that is based off of the “Dominant Amber” game in the AtGames Sega console. The screen shows a random arrangement of two different colored objects, and you simply select which you think is the ‘dominant’ one. If you get it correct points are awarded. Incorrect responses subtract points. There are two minutes for each game. In the first minute, the dominant color is a bit more obvious.

http://atariage.com/forums/topic/260540-dominant-amber-2600-hackaday-1kb-challenge/