- 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
This should be the world coordinate of grid square `[0, 0]`. `[ -24, -6 ]` is the world coordinate for grid tile `[0, 0]` for scenario 1.