Pengon

Just as the name implies, Pengon is a clone of Sega/Coreland’s old arcade
game, Pengo. You play Willy the penguin, who is trapped in a maze filled with
dangerous mutant sea lions. Willy’s only defense is to push the blocks of ice
that the screen is made up of, so that the blocks hit the sea lions and crush
them against the walls.

Of note is the difference between the versions; the original program was made
in America for the Tandy Colour, then ported to Dragon 32 and published by
Microdeal, who liked the name enough to put it on Pengo clones for the
Commodore and Atari which graphically have little in common with the CoCo
game.

Pengon