Ok, another idea: create a video game that doubles as a music video. It doesn’t need to be super flashy, in fact, if it has a retro feel that may be even better. Open it up to people on mobile platforms and there’s a chance it might do something a little more viral than just the usual kind of video.
Seems like a couple of people have already explored this hybrid genre:
Looks like it might be possible to create something in a program called Gamemaker. it’s a pretty interesting way of creating stuff and may be a good way of developing something retro and simple at some speed.