Fun game . I found two bugs. First, in the tutorial, sometimes Zep would move one extra step after the dialog came up. As in the dialog would tell me to try making a block on the red thingy, but Zep had already walked past the red thingy (interestingly, I still couldn't make the box). Second, if you try to save the game while running it from a read-only volume, such as the disk image I downloaded, it says something about not being able to write something and crashes.