Decided to make a very quick game. So there it is. Made in two hours, unimaginative and boring. Absolutely horrible code, but apparently without bugs (I hope).
So test your memory on SUPER DUPER SIMON!
There are still things I'm trying to understand about Pico8, also I'm not used to define low level stuff myself. I find these small projects help me.
edit: updated with a bug fix
I made this just to get acquainted with Pico 8. It's a 2D gravitation simulation in a closed domain (the planets bounce off the walls). You can add planets, toggle lines and watch trajectories.
Fun fact: for 2 dimensions, the power law of gravity is actually 1/r. So you won't see closed orbits even with only two bodies.