The single best indicator of what your overall score will be, is how fun your game is. Innovation, theme, and graphics all are noticeably correlated with the overall score (though a few outliers managed to get a good overall score without meeting the theme). Audio has a slight correlation. Games with good humor tend to have a high overall score, but games with little humor don’t necessarily have a low overall rating.

 
Next I have a few observations on the ranges of values in various categories.

Innovation: Very few games scored below 2 in innovation. It’s clear that innovation is being done.

Theme: Most of the entries made a good attempt at the theme, but a few seemed to ignore it.

Audio: Not many entries scored well in audio, and some put little or no audio in their game. Does this mean participants don’t have very good audio skills, or just that audio was somewhat neglected in the competition?

Humor: Very few games rated above a 3 in humor. Only handful of games both tried to be funny and succeeded.