Guide young Pengy around the screen pushing blocks of ice to squash the evil Spongs! Bump Pengy into the walls to electrify them, so when any nasty little jelly Spongs touch them they're paralysed and rendered harmless, leaving them squashable with just a well-placed flipper.
Gain bonus points by lining up crates of frozen food into horizontal or vertical rows, and extra points for any remaining ice blocks left in the freezer when all the Spongs are dead.