Your mission is to save your jewels from getting stolen.
Move your copter to find out and chase the thief.
Use W/A/S/D keys or arrow keys to move your copter.
Drag the cursor to aim, and click the mouse to shoot at the enemy tank.
If the enemy tank is hit by your bullets the enemy strength gets reduced by 5%. If the enemy strength becomes zero before all the 20 jewels are stolen you win the game.