If anyone has this problem (demo or full game) where the game just exits to the desktop after the intro movie, rename the 'miles' folder to something else, supposedly you'll lose background music but I honestly can't tell, everything sounds just fine!
The minimum specs for this game are misleading, it runs damn good on my old system, ATI x800 pro, 1gig ram, AMD 32bit 'single core' 3ghz.
Minimum specs say a 64bit dual core CPU is needed... rubbish!
This game is seriously worth every penny.