This driving me crazy this a game I had as a child:

http://i971.photobucket.com/albums/a...ps06232ed3.jpg

sorry best I can draw.

It involved knocking a row of marbles down a stepped slope with a larger marble.
It was 2 player and the 2 slopes faced each other. The marbles would collect in a tray at the bottom.

I can not remember the name of thsi to save my life.