Big project! Part of the key in hackathons is being able to narrow/tighten the focus. Really distill 1 key feature that makes it dead simple to explain the pain you are solving and highlight how you win.

Connecting high-school students with volunteer opportunities. Decent idea with a strong social aspect. Why an app and not a website?

spent too much time talking about the problem rather than demoing the product. Can state in 2 sentences and then launch into demo and tell us about plans. Still pretty conceptual. . . .

The pitch needed to be much more concise. Less explaination of the problem, and focus on demonstrating the solution. Didn't have much time to see the solution. Played around with it for about a minute and wasn't too intuitive to use and not clear what was working and how a typical user would input their volunteer hours, how organizations would track it, etc.