I understand the desire to get lots of rating and be the 'winner', but I imagine you don't actually win anything, and isn't it the quality of the ratings that count rather than the quantity?
This is my first game jam, and overall it has been a great learning experience. In general, I've had lots of thoughtful feedback and it will help me refine my skills and make better games. I hope that's what most people will gain from this and that they won't be discouraged if they don't win. Probably the important things you can get out of these jams are: The experience of completing a game to a deadline, the feedback, experience of reviewing other games, and maybe a network of developers to potentially work with in the future.