[projectx] Really easy levels.

[Neil & A. N. <nk...@us...>]

We talked about levels a bit but I think it could be really easy to
implement them. Just block people from going to and from the levels
unless they are on a ramp. It would really be easy.

000000000111
000000011111
000112111111
111111111111
111111111111

Just prevent people from going 0 to 1 and vice versa.
Allow people to go from 0 to 2 and 2 to 2.

-Than