I'm absolutely open to PR's. I tried to make it easy to add your own scenes. It's also MIT so feel free to take it and run with it..
1. Yep that makes sense. I haven't really tuned the phase progression much and it def needs a lot of work. For the rocket themes for now they are progressive only until they end but id like to give them the possibility of a bumpy ride so to speak.
2. Yep definitely. Going back to the original server idea.. I'd say it would be even necessary to be able to have a config to make one session have a specific (or random) scene.
3. Yes! I was just thinking about color palettes. ie company or flag colors.
4. https://github.com/samuelclay/crabigator https://drinkcrabigator.com to save others looking it up like I did. Looks great go for it!
I've got some different features in progression so feel free to throw these up as PR's. Otherwise I might get to the config or color palette one day.
Thanks!