As someone who played a lot of roller coaster tycoon growing up, I am impressed! There is a lot of functionality in this for a game jam. I also like the mix of building a coaster and collecting orbs, which was a fun constraint. I don't think I noticed any other secondary prizes related to speed or G-Force, but that could be cool. Maybe like, extra stars.
The control was a little finicky sometimes, and it would add extra nodes as I dragged forward. I'm not sure if that was by design or not. :)
Great job!