Houses

One of the more overt demo games to come with Game-Maker. You could kind of consider it a spin-off or crossover from Sample. You wander from house to house; depending on which door you enter, you branch off into a parallel version of the map starring a different character.

One of the character sprites is based on Eadweard Muybridge motion photography, and I believe by for RSD's benefit. Yet the final game, so far as I know, is by RSD. I think the game is a later addition to the demo portfolio, and perhaps was added for the 3.0 CD release.