Award-winning assembly-language animation running on a classic Mac

The winner of this year's "oldskool demo competition" at the Assembly 2009 (a festival of low-level assembly programming) is this sweet animation, "3½ inches is enough" by Unreal Voodoo, which is apparently running on some kind of monochrome 68K classic Macintosh.

3½ inches is enough by Unreal Voodoo

(via JWZ)