A new version of this scenario was uploaded on Mon Oct 27 16:51:32 UTC 2014
Added Enemy, GroundEnemy, and FlyingEnemy classes that can be spawned. Did some preliminary preparation for the world saving/loading system, including giving all of the classes small string prefixes and changing the PlatformJumper so that it only act()s when the player object isn't in godmode (with the exception of the player itself, obviously).