This is a great question to see where everyone is at!
Usually we suggest that the first week of the jam is spent BRAINSTORMING. Here's a video from last jam (skip to 4:27 to get to the point about the jam):
The next 2 weeks should be spent PROTOTYPING out the ideas you've come up with. This is where you should be about now... have you made the core mechanics of your game fun to play? Another video from last jam:
