This was my first portable console. I used to call it a Tetris machine, though. I had the green one and Tetris, a Legend of Zelda game, and a Donkey Kong game for it. I ended up trading it to a friend of mine for money for a mountain bike, and the idiot left it at a campground somewhere. I still have the mountain bike, strangely enough. 
EDIT: Upon reading the wikipedia article, I apparently had the "Play It Loud" Game Boy instead of the Game Boy color. The green color threw me, plus they released like 10 different versions of the original game boy.