In all the talk of graphical downgrades no one seems much preoccupied with 'why?'. Why build something and then proceed to tear it down, piece by piece, in the hope that ever more diminished expectations about the final product won't be severe enough to...
Tapping the retry button instantly takes you back to the start of the level.
If a rock bounces into your mouth, you can catch it and use it again.
Always be on the lookout for ricochet shots, for they're the quickest way to clear a level.