Ah! This is going to sound dumb, but I didn't even think to try pausing the game because the map wasn't mentioned on your controls description. xD
Tried again! I don't think I got there. The map helps a little, but it's the Z interlocking that's tripping me up. I wonder if being able to tab between the layers on the map screen with some sort of visual cue that indicates which depth I'm on would help more.