Too Good to be True achievement in SpongeBob's Truth or Square

This has to be done on your *first* play-through of a level, so if you die and try to go back on the same save file and play it again it won't work.

What I did after I beat the game is went to a new save slot, played the first level all the way through (did not use travel boxes), was really careful not to die, and did not use the rainbow power-up or the Patrick power-up offered at the end of the level.