How about this. If you'd prefer to make an alternative theme, why don't I take some time and make a whole new alternative theme for fun. I can imagine something with Descent 2 bots and css3 animations, but nothing that a 1Ghz cpu with 1GB of ram couldn't run.
You're welcome to try, but keep in mind one of the biggest annoyances with themes I've had is phpBB breaks them for every major release milestone. So 3.0.x themes don't work on 3.1.x, and 3.1.x themes don't work on 3.2.x. It wouldn't be so bad if they documented the necessary changes for each version, but they never do which makes it a big headache.