[PC][2000] marble game

We used to play a game on a Windows PC ( maybe 98 ? ) of marbles. The description is below, hope fully someone can help me find it.

You have a 3d view of a grid "base", made to look like a metal playground, like early Robot Wars (UK - maybe Battle Bots in the US?).

The "marbles" can be normal, rubber or metal. They have a start point and there is an exit square where you need to get the marbles. You can place ramps/angled divertors to "bounce" the balls in a different direction. The metal ones have more "weight" and so when they bump into the rubber ones they give it more speed.

I *thought* the name was called Marble Run but I have been unable to locate it.

Thanks in advance.