We need more mash-ups in video games.
You know, like when a DJ takes two great songs, or two awful songs, and turns them into something all together different, but still recognizable.
Take for instance G-Switch. It plays an awful lot like the bastard child of forever-runner Canabalt and gravity-flipper VVVVVV. And it's pretty great fun.
The developers also added the ability to play the game on one keyboard with up to six players, which is insanely confusing, but still fun.