At the start of the VISR Mixed Reality Accelerator we had a week to play with the Vertx platform and design a game tha would use it's capabilities. My team decided to create a simple game about sorting boxes based on their colors.
To achieve this we had to understand how the Vertx platform works and how it can be used to connect multiple people to the same session. After that the next thing was how physics would act, to solve this I implemented a system where only the first player connected would have control over the physics simulation and when anybody else wanted to pick up a box they would ask him to give them permission. The system allowed us to have physics object in the game and made everything fun.