If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You are a peace-loving leader of a country somewhere in the Middle East. Not-so-peaceful soldiers form far away are trying to seize some oil you posses. Do not let them do so.
This is a turret-defense game where you defend oil barrels against waves of enemies. Includes boss fight on the final 31st level.