Original penguin game (slow)
You're doing well with a score over 300
Credit: http://www.loosenut.com/~russell/swf/yp010.html

Penguin game (faster)
Over 600 is possible
Credit: http://www.birdcheck.co.uk/whackthepenguin.htm

Steriods penguin game (fastest)
1200 is simple to master
Credit: http://games.apropo.ro/pingu_v3.html

Bloody penguin game (fast)
Random mine hits can yield well over 700 points
Credit: http://media.nothingtoxic.com/uploads/3f102e568ac6ad23dc3e5f7b4efe767b.swf

Penguin Seal Bounce game (different)
Over 300 is a decent score
Credit: http://www.flashgames247.com/13687/games/yetisports3/yetisports3.swf