It's called music in motion because, if you hadn't noticed, the blocks and spikes, and boss's attacks all sync up to certain beats in the music. Therefore the music is in motion.
I find this game to be incredibly difficult to play, however well put together it is. There have been several instances where I got a zilch after being forced to take points, and couldn't have banked them before because they weren't enough points. A poor system is this game's downfall.
It's like Fantastic contraption for adults because it's far more complex.
I'm still trying to figure out if I can get the sliding joints to work so that I could build an engine...
Craziest game EVER. This is hard, but not impossible, and the randomness of it keeps you on edge. It's too bad that you can't get the M-249 or rocket launcher in this one, as those make the game WAY easier near the end. At one point, at jonestown, I thought i was gonna die, since i got swamped with 7 dogs at once. Thankfully, I had my trusty Chainsaw and sliced them down before they could do more damage than they already had.