Press space to clear the map. Left and right arrow keys to scroll tiles, or click from the bar. Click to place a tile. Press S to prepare a save, and L to load a save. Press E to load a save WITH editor tiles on it (because you can't save again after a normal load). QUICK SELECT: 1- ice tile 2- stone tile 3- changer tile 4- lava tile 5- eraser After saving, export the list into a notepad file. Import to load.
***UPDATE: Dec 15, 2013, 3:37 PM: The Frozen Labyrinth has been released! http://scratch.mit.edu/projects/15192801/ ***UPDATE: Dec. 9, 2013, 10:01 PM: - Clearing no longer allowed while saving or loading. This is a level editor for a new game I'm currently working on. It should be out soon. SERIOUSLY, THIS WAS LONG-NEEDED, I DON'T KNOW HOW I SURVIVED COPY AND PASTING ALL THAT TIME. Loading a save will print out a much prettier version of the map--the dots on some squares currently are just being used for saving purposes to make that script easy. Unfortunately, turbo mode seems to ruin the prettiness and the bottom-right corner of some tiles seem to be messed up anyway. IN THE FUTURE, I will compact the save code into one line. I just wasn't thinking about it at the time. When I do this, it will also save to the cloud. Hopefully.