The rules are very simple: The robot with the most marbles in their corner (taped off squares) when time runs out is the winner!
Below is the poster I designed to promote the event. As you can see from the dates, this actually happened ages ago, but I've been to busy to cut everything together until now. The next event will be some time in August.
Edit: Fixed the broken encoding on the video. Fun fact: This video took longer to encode than the entire event took to organize! Peas out.