There is also the ability to create your own maze. In the grid designer, ( 0 are empty spaces, 1 are walls, 9 is your position, 7 (star) and 8 (cheese) are powerups and 2-6 are cats of varying speeds ).
Also added a couple entry/exit possibilities ( a b ) and ( c d )
You can either solve the numerical levels to advance to the next, or for jam/cheat mode, just hit Page Down and you can play the next numerical level.