^ I agree, except that a really fun game should sell in spite of it's flaws. You've mentioned a lot of little niggles with the game, but from what I've seen most people who play it still have a blast and it's even consistently fun. Just Dance is also highly flawed but it sells because in spite of that, it's just so much damn fun.
And really, if it were these things that were causing the sales we'd see it in later sales, not the first week. The little issues you've brought up are things you would only realize once you've been playing the game for a while, so it's not something that would kill sales in the first two days.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.
