Here's a comment which suggests that at least some of them are thinking 1 star is the best:

Kubilay Tekin: I hadn't gave 1 star just because I want my comment gets shown on top, I actually think that the game is aweful aqws.w.wew..ws

(I've seen this phenomenon before - there are quite a few who associate 1 with first place, hence surveys and such often have the [1 = worst, 10 = best] next to each "rate xxx on a scale of 1 to 10")