@TechnoGeek & goog:
There are special versions of Snake, actually, and not even necessarily on the computer. Has anyone played Snake EX2 on the Nokia 6070?
You have an option of Extreme mode, which starts off with no walls at all, and at certain score values an exit appears in the level, and it takes you to the next level. In addition to the dots, it also contains moving bonuses (if you collect them before they expire, you get bonus points). There are six different mazes (No Maze, Box, Tunnel, Spiral, Blockade, and Twisted, in that order). Unlike this version of Snake, in Snake EX2 you have 9 different speeds to choose from. Ahh, the possibilities are endless...