The WASD keys control the acceleration of the player. This can lead to "floaty" movement than is hard to stop in a particular direction. This necessitates some "look-ahead". When collecting an orb, one should have already began accelerating towards the next one, so as to not lose any time completely stopping and starting. While this movement philosophy would appear to necessitate a predetermined route, one can "wing it" just fine as long as they follow a heuristically sensible path and are always predicting their next orb.