The author hasn't complained (yet). I will open source it if he wouldn't mind.
Regarding moat, I doubt the logic behind a server would prevent anyone to copycat game concept and graphics. Games have always been cloned as community remakes, with little recourse to take them down.
Nice! Some ideas: Please can you remove the text that hides the main game view. This is the biggest annoyance on both games and slows you down a lot. Also the gravity / physics feels off. Orbit is too slow.
https://orbitup.surge.sh/
- FPS tweak to fix variable speed - Can bounce - Life points instead of sudden death - Levels - A few effects - Better adjusted difficulty