After many remakes, restarts, crashes, and system collapses, I finally got a working simulation os my home solar system of my new fictional universe, Olheria.
There are two objects with life, Origin and Unaeq (I think that's what it's called lol ^^)
Origin is the one with sentient life, Unaeq is just infested with water creatures.
You can download and run it now by clicking the attached file below.
EDIT: I actually found out, over time, that the System is unstable :c. Over time Origin and Unaeq collapse and collide with other bodies.