It's easy.  The object of the game is to keep smiley from stealing all your loot.  There are 10 rounds, and smiley gets quicker each round.   To stop him and advance to the next round you must put 3 bullets through smiley's forehead.  Each bullet will cost you $500.  Each bag of money smiley steals before you kill him will cost you another $500.  The game ends when either you successfully defend your loot for 10 rounds or lose it all.  If you succeed in defending your loot for 10 rounds you can enter your name into the list of the top 50 smiley killers.  Good Luck.