Minecraft is a first-person fighter/sandbox construction game created by Mojang AB.
Within the first half hour of getting the update i had already constructed so many things with pistons, i thought "holy crap, these things are pretty cool!" So i uploaded this file. (it also contains some of my other piston related projects and a coliseum i built a while back.) Just copy this file (not the zip, the file in it) to your minecraft saves folder, the level name is flat-testing world. BTW you will also spawn with items and the like.