The game has several instances where it is really toying with you by having various texts on the wall.
"Did you really think that would work?" is displayed in one of the puzzles in the third world if rushing to a trap.
In he penultimate level, a message "Have a think about what you've done" appears at the expense of player's nerves.
The preview for the Deluxe version shows a Red robot, which says "These robots are blind". Cue the player rushing past...and being shot on the spot. The sign then changes into "I said blind, not deaf.".