new level: 2,0

I've moved 1,0 and 1,1 to 2,1 and 2,2 respectively because they're the
hardest puzzles and both rely on the lower fence

2,0 has two available grave spots and could be moved to the middle row
if needed
the real level 2,0

as predicted, I needed the corner for another level so the old level 2,0
was moved to 1,2.

(the now level 1,2 had to be updated since it could no longer take
advantage of the lower wall)
one last level

level 1,0 has been moved to 1,1 because it doesn't rely on any walls,
and in it's place is the last level
tweak some displays

- move the title screen over a few pixels to center it
- shift the graves down a bit on level 1,1 to be more cenetered
- add more ghosts to the ending screen
- up the framerate to accomodate for flicker in the ending screen