Fun idle style game for those with multiple types of Gameboys.  I guess you could make this work with emulators too, but the I imagine it wouldn't really hit home that way.  

As is, it's a cute thing to play around with.  I wouldn't call it a full-blown game.  As a tech demo though... I'd love to see this mechanic worked into other larger games.  Or see this game given a way to win/lose.