Tell Gobo the size of the labyrinth (X between 4 and 14, Y between 10 and 22). He'll generate it, and you'll have to guide him through the labyrinth. Run it in turbo mode to have a faster generation of the labyrinth.
Generate a labyrinth of any size, and try to reach the exit. It looks like the last labyrinth generator I made, but this time, the walls are thick : the generation is different, and a bit more complicated. See: http://scratch.mit.edu/projects/13409263 All the source code was made by me.