with the escape from area 51, i was thinking at the back of the playfield is like a large rotating disc playfield that rotates 120 degrees x 3, so each time you get up a level the playfield rotates 120 degrees and changes the game play a little which each part rotation.
maybe in the backglass a vertical playfield aligns for the escape to shoot a ball vertically into space.
like the surf zombie theme, would it be a dirty donny style art?????