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...
Smaller moves are more accurate than big sweeping ones, so try and stay calm.
Learn the pattern of each obstacle and you'll be ready to face whatever comes.
Give your sphere a wiggle when you start to make sure you know which way you're facing.