You can build levels by blocks (48*36=1728 blocks!). There are 9 types of blocks: start block, goal block, wall, lava, ice, key, door, checkpoint and teleport (each block is detailed on the project's credits). After you built your level you can save it locally (by pressing S) or convert it to a code (by pressing C and then click on “Get Code”). This code called “Level Code”. Then you can publish the level code on comments or save it on a notepad file on your computer so you can load it when you want.

Here is a link for my project:
http://mv.ezproxy.com.ezproxyberklee.flo.org/projects/10059873/