Pretty cool! I see some rare behaviors like maybe there is a weak magnetic property and certain combinations of particles are more prone to it than others? Trying to rationalize this behavior I see after about a minute where some "molecules" seem to start trailing others.
https://exophysics.net/
It's more simple, and more about physics than biology, but the emergent phenomena are pretty interesting nevertheless. This universe comes the closest to a life simulation: https://exophysics.net/exhibit/mordial.html [based on the Primordial Particle System, https://www.youtube.com/watch?v=makaJpLvbow]