Penguinz Guidee:
Lvl 1 - Buy desert Eagle and upgrade to full damage and 60%accuracy.
Lvl 2 - Fully upgrade accuracy.
Lvl 3 - Heal yourself if you need.
Lvl 4 - Buy the M16. Heal if needed. You will fight the boss :D
Lvl 5 - Upgrade damage to 60% and Accuracy to 60%
Lvl 6 - Buy 'Laser Sight' and 100% Damage.
Lvl 7 - Upgrade to 100% Accuraccy.
Lvl 8 - Save upp!
Lvl 9 - Save upp! ( Boss Battle)
Lvl 10 - Nearnly at the 30k Mark...
Lvl 11 - Buy the Gattling Gun! Upgrade its accuracy to 30%.
Lvl 12 - Get slug Mode.
Lvl 13 - Upgrade accuraccy to 60%.
Lvl 14 - Upgrade accuraccy to 100%. (You could buy an Uzi and fully upgrade everything just for fun!)*BOSS BATTLE*
Lvl 15 - Now you only need your cash for health... so just buy whatever!
 "Penguinz")
 "The Horror!")
 "SouthParK CharacteR")
 "Map Maker")
 "Basic Maze V3")
 "Touch My Button!")
 "GemCraft")
 "The Proving Grounds")
 "GuessNextTutorial")
 "A Knight's Story")
 "Dolphin Olympics 2")
 "Basic Maze V2")
 "The Space Game")
 "Racer Domination")