Why clone machine under anything?

[James]

What random 8 said, although Chip can in fact completely ignore buried walls when the upper tile isn't transparent. This means that Chip can still win on exit/wall tiles, collect chips on chip/wall tiles, press buttons on button/wall tiles, open sockets on socket/wall tiles, etc. (the walls will reveal themselves after the chip and socket instances) Walls on the lower layer are usually very submissive tiles.