Need help / consultation with a product

Hello everyone, I'm currently developing a product, and I would really appreciate you to help me to make a right decision. I need your vision for my problem.

Well, I have a concept of my future app and code which is done by ~40% (main logic is almost finished) but I can't finish the last and the main thing because I don't know what business logic I should do for this feature, I have it in my head, but can't come up with an exact idea.

The concept: quick hackathons online with matchmaking. So this is an app where you can participate in quick hackathons just like you play videogames. There is a matchmaking algorithm that makes it more competitive, and it feels like CS:GO. People are just brought to one room divided by N teams which are of M people. They are given time to create a project together, works the same as a hackathon. And then, when the whole work is finished, they're being published in a global feed like a post which consist of teams and their projects. Everyone is able to vote for the best project in a particular match (which is published as a post) and the most voted team/project is a winner.

Back to the problem: I don't know how teams are going to work on a project. Like, is it better to have static projects in my database and there would be a random one for all teams in the room, or it would be better to make teams come up with the project ideas by themselves. But will they do that?

To make it clear, my mission is to make hackathons feel like an online game, and make them more accessible.

Again, I would really appreciate your consultation. Looking forward for your help!

Also, don't forget to stay home, take care of yourself, and drink tea. I wish you health in this difficult time.