A buddy and I built a 3/4" plywood base, 3' square, and about 12" tall...inside, or underneath, we mounted an electric motor, and gear reducer, with the drive shaft sticking up thru the center of the base...Then we rigged it so we could mount a full strut turkey target on top....It also has a rheostat, to control the speed of the spinning...put a nail in the center of the kill zone, see who gets closest!!!
Another fun game is simple tic tac toe, on the big square target butts...
OR, a running target....our club has a running Javelina...someone rigged up a trolley system, attached to the back of the pig, with eye bolts, and it hangs on a long length of cable, and it runs downhill for about 40 yds...gets some good speed when it hits the shooting lane! Tie a rope to the trolley, to pull it back uphill for the next run!