This seems pretty cool. Maybe add a way to see the trajectory of an individual marble so its easier to see how they react to adding blocks? Also the vertical boosters feel redundant in comparison to the speed boosters (unless I'm missing something).
vertical boosters are kinda redundant, though they are more powerful/expensive.
im thinking about renaming them mega boosters (or maybe mega bonkers if I can design a gizmo that looks like something that can bonk the marbles)
Shark