I dunno, the design seems like a good idea to me, though perhaps not the lack of online. I don't know if the typical gamer prefers the simplicity and ease of this version, or the direction and progress of a career mode.
Though reviewers have a tendency to hold bad reviews back for big games sometimes, so it should lower a bit.
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A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.