Mudpies is best described as a single screen, overhead, arcade shooter played for high scores.
Similar in style to Robotron the player takes control of Arnold, a young boy who has disrupted a circus by throwing pies at the clowns. The clowns however are not happy and soon they begin throwing things back.
By controlling Arnold, the player must navigate around the play area avoiding angry clowns and hitting them with pies to collect points. Clowns will attack by throwing juggling clubs and if hit by a clown or club will be sent to the First Aid tend and loose a life. Three trips to First Aid and it's game over (extra visits awarded for each 10,000 points scored).
Arnold also has a food meter to keep an eye on which must be replenished to keep him moving. Picking up burgers, fries and shakes are just what he needs but overfeeding is just as bad as under feeding however and if the meter gets too low or high he will slow to half speed.
The game has support for two players with play alternating between each life lost.