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...
Use your first few passes on a level to memorise the layout.
You'll get a higher score if you don't use bonus items.
Try not to obscure the screen when you play - that applies to both sides of the device.