Here are a few things to improve:
1-make tracers invisible
2-make evrything frictionless
3-just dont put borders on everything
Do these things and you might become a profesional marble racer!
You know you could just add gravity to the sun and make the planets orbit right?
Also why does the time that takes the Moon to make one full orbit and the time Earth takes to spin on its axis? -_-
Here is a fun fact: before the 3.0 release, if you opened the scene up and looked behind the title screen blocks, you would find an easter egg! Im not telling you what it waaasss!!!