It was a mod for blockland v0002.
Thats really all I can tell you I mean, we had doors, movers, weapons, editor wand (it could change the sizes of bricks and different stuff.) It was kinda hard to build, well for me anyway. Plus some of the controls were different. You can look in the Archives section to see what builds and mods where like. You just can't post in those topics.
A topic was already made about this :P