Thank you. The physics engine we're using (Rapier) really does most of the work to make the spin of the marble look realistic. But we spent quite some time tweaking the controls to make them as enjoyable as we could.
The marble has the perfect amount of friction, I'm able to "drift" around corners which feels really nice.
You did a great job. The physics seems about as enjoyable as those of Rocket League and they must've have spent a considerably larger effort.