March, Choco, and I discussed this a long time ago. One thing we all believe is that we should not discourage anyone from making games on the site unless their games are inappropriate (as defined above). We want the site to be laissez faire -- if a game is bad, then it will have bad ratings. But everyone can get their game "published" on the site.
If, as a first time player, you see "Rating: 1 - Homework is more entertaining", then you should have pretty low expectations. Myself (as the site programmer), I wouldn't waste my time even looking at anything less than a 4.
We'll get the rating system soon enough ... once this latest upgrade is in, we'll talk about where to focus efforts again.