Is there a limit to how many people should be in a team?

Individuals and teams of 2 to 5 members can participate.

What if I already have an idea that I would like to work on?

Having an existing idea you'd like to work on is great! But in the spirit of fairness we would have to assess that you did not have existing product development work done prior to the hackathon for you to be qualified for prizes. However, you can still participate in the pitching session.