SegaSonic Popcorn Shop is a 1993 vending machine which dispenses popcorn in one of three flavors—salted, butter or curry. The popcorn is prepared (microwaved) in a compartment invisible to the "player." It falls into a cup held in a compartment next to the screen when it's finished.
To play the "game", the player turns a green crank to help Tails get the kernels into the cup while Sonic waves his finger at you. However, the popcorn is dispensed whether the crank is turned or not. So the game is not needed.