I'm currently working on the controller for Player 1 (red), but I previously got a working skybox (free skybox from the asset store), which fits perfectly, along with a simple platform that matches it. I would've done the picture I drew, but Unity doesn't allow those types of files for things like skyboxes, as an example. (Also, I thought I submitted an old screenshot of these two without the skybox and platform edit last class, but here's the updated version).