Amazing. i love everything about this game.
The black and white visuals, the others floating above, the fact that getting hurt doesn't kill you, just slows you down and the only way to cure that is to stop (which takes time).
Some levels are frustrating (for me, who isn't good at platformers and usually avoids them for this reason), but this actually caused me to jump on spiky balls becouse that was the easiest way, and I think this is a perfect depiction.