If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
*** Don't be discouraged if it seems hard at first, just keep buying upgrades!
Collect chocolates and powerups while avoiding enemies. Buy upgrades and compete for the longest distance! If you ever hit an enemy, go for a combo and you may get special rewards!
FAQ / cheats: http://www.thepoxbox.com/art.php?id=chocolaterun