I've had problems with the game deleting my work as well. I don't personally share any of your other complaints, though. I only thought the soundtrack was OK, but then DIG A HOLE came on, and changed all that. The later uses of songs were pretty amazing, too.
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Xbox GT/PSN name: TatteredUniform
http://www.scuffletown.org/wp-content/uploads/2010/05/tRBE1.gif