- Add a third scenario that lets you drive around the maze.

- Made the RAM in scenario 2 the same as scenario 1, so you don't start the scenario with an "out of ram" warning.
- tweaked a spot on the maze grid where you should collide
Probably not too big, but 5000 is a big jump from the starting 30. I don't think the visual percentage of the 30/50 matches.