Gonna go back in time!
Got a couple of minutes to spare? What am I saying? Of course you do! Check this shizz out!
NeoGAF user asa spent a few days messing around in Unity in order to make a nifty interactive NES music box. By pressing the power button, you can listen to the theme song of the game currently inserted in the machine. If you want to listen to something else, simply eject the cartridge and pop in a different one. And when you get tired of NES jams, you can even flip the channels on the TV to see what's on!
It's actually really tough to handle the cartridges, but if you can get past the jankiness, you'll enjoy this nice return to Saturday morning circa 1993. If only asa had programmed a way to blow on the contacts for that authentic old-school experience.