Thanks! If you want to try adding more assets to the level hit "space" it opens up the asset menu. you can even paint your own 3d assets.
by:
1. Press Space to open up assets
2. Create new galaxy ( a brown cube to start)
3. left click your new galaxy to place it in the scene
4. press tab to open up tools
5. select the paint brush icon on the left.
6. Select your galaxy (3d object)
7. Select you paint brush at the top to start painting
A lot now that I type it out, I'll have to improve the flow, but it's pretty straight forward once you see. I just typed this out in case you our anyone else is curious, I just appreciate you taking a look to begin with :)