Algodoo

If you have played Bally's Centaur you might've been releasing "power orbs" during gameplay. Normally there's metal plate on the shooter lane, which lifts up as ball gets kicked from secondary trough in the machine. Under playfield image(on the right side of it): http://www.ipdb.org/showpic.pl?id=476&picno=30709&zoom=1 I've recreated this in Algodoo. The controls: Z - fire ball from main trough X - Fire ball from secondary trough.