I have for testing my Game Boy creations a Game Boy Color, a Game Boy Pocket, a brick Game Boy (in case I need one), and Super Game Boy. I decided to mess around with Game Boy Color programming. I found a way to change the light gray color to yellow on GBC while still making it work on the GB pocket, with the lemon displaying as light gray.
Now that I have this, I don't know what to do with it. Perhaps I could make a Fast Food type game with food coming in all directions. I'd like to make something that doesn't use a battery. I also put in a Super Game Boy border. I think tomorrow I'll add some music to this screen.