I just got my Gamebuino Classic yesterday and have been tinkering with it. I just notice an issue with the contrast setting. It's not working no matter what values i press. Games like 101STAR.HEX, INVADERS.HEX, FLAPPY.HEX, SUPERCRA.HEX, and more..or games with fast moving grapics are almost invisible. Could it be a defective hardware?
I tested a nokia 5110 LCD i have with an Arduino Uno but display is great.