Select a level or make the game faster:
From the main screen (after it loads), type L. This brings up a level select. If you pick a level, your highscore will not be recorded. Select Turbofunk mode to make the game play as quickly as the hardware you're using can support.
From the main screen, type X. This brings up a rather interesting poem.
If you play it on December 25 (Christmas) or if you set your system's clock to that date and play the game, christmas-tree balls appear on the title screen!!
Thanks to Revolution reader Joel Maloff!