I'm picturing similar to the Stargate glider toy only 4 times larger, and 10 times the complexity in terms of free trajectory.

The moving mothership saucer should have had a magnet attached on the end of the arm to pick up the ball in play and return it at random to the mothership base - a sort of "Close Encounters of the Fourth Kind" mode.
http://en.wikipedia.org/wiki/Close_encounter#Fourth