Also wondering how to play some levels if, say we can make them separately, or maybe something like an editor, much like Overgrowth. Also wanted to know if this level down here is in the game yet or not?
You will get an email when a new one is available. At that time you can either download a zip file or use the itch.io app to update the game!
Right now there's no way to make custom levels, but next update will feature Endless Mode with a slew of new levels! The level from that screenshot was an old prototype that is no longer in the game. You can see the emperor in the background looked a bit more like he was made up from some hastily arranged cubes. :)