GaS Simulator is a web application to simulate past italian team math contests from phiquadro.it. Users can clone past contests and add new teams to them. These extra teams can then interact with the contest by submitting answers, while the real teams' activity is replayed.
A deployment of this application is publicly available on gas.vercelle.si.
This project is written in Rust and uses rocket and diesel. The API documentation is available here.