Pengo is a adaptation of the classic 80's arcade game of the same name and also known as Pengi.
You take the role of a penguin named Pengo who finds himself in a maze made up of ice blocks that is surrounded by a fence. If the blocks are kicked, they will slide along until they hit another block or the fence. If however, the block is already touching something else (in the direction it would slide), it breaks and disappears. Three (or more) of the blocks are special 'diamond' ice blocks which cannot break.
The maze is inhabited by 'snow bees' that are deadly so must be avoided. They move around in a semi-random way: a bee may sometimes choose to get away from Pengo instead of chasing him (especially on early levels). The bees can be killed by crushing them with a moving ice block (bees do not stop the blocks so more than one bee can be killed with one kick). This momentarily stuns them and they can be crushed by simply walking over them. Only a set number of bees are on the screen at once (3 on level 1) but there are more on higher levels which emerge as others are killed. Note that the bees will resurrect after a while. A level is completed either by killing all of the bees or by lining up the special diamond blocks. The latter is the preferred way of completing the level because a huge points bonus is awarded.
The number of bees on screen, the speed of the game, the intelligence of the bees and the number of diamond blocks all increase on each successive level, making it much more difficult to successfully line up the diamond blocks.