If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your job is to beat anyone that comes near you, each level has a hand full enemies waiting to fight you and a boss at the end of each level.
Left / Right Arrow Keys - Turn.
Up Arrow Key - Turn.
Spacebar - Weapon.
Z - Punch.
X - Kick.
C - Protect.