Help request: Function Nodes (branch)

Before anyone raises their pitchforks and torches, I am fully aware it is a branch for a clear reason.

Still, I want to ask: Is there any way to could get the particles to collide? I am trying to dig through the list of nodes, but even giving objects collision detection does not quite work out well.
The video I attempted to follow along is outdated due to the lack of nodes available now that were available at the time. Basically, I am trying to get my feet off of the ground with this branch.

I just want to ask: May anyone lead me someplace other than a brick wall?
Video in question:

Edit 1, minutes later: Please do not ask me to go to Blender Stack Exchange, that place is anything but welcoming.