I've played most of the games in the listing, and most of the ratings seem to be spot on. A few, however, I believe should get another star. I have an Idea, if possible, you could saet up catagories that the game must score in. You could have: Graphics; Sound; Gameplay; and lasting appeal. Also, you could have more freedom of scoring games if you went on a scale from 1-10. The five star rated games could fit into being 9.4's or 9.7's and only give a 10 to REALLY good projects. this would give you flexability when deciding on a games score.
Example: [ this is only an example ]
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Rolly-
Graphics: 8.0
Sound: 8.0
Gameplay: 9.5
Lasting Appeal: 7.0
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This would warant the game an average score of 8.1 [I think].
Furthermore, you could have a catagory called 'Personal' and this could be used to boost it's score a little, based on personal experience. Let's say a game has bad sound, lackluster graphics and REALLY good gameplay. The other two catagories would drag it down, but you give it a 10 on personal to boost it's rating, because you feel it deserves it.
This is only a suggestion.