Warplane Shelling

Warplane comes one after another and then are changing position. You must find its position and you must to fire.
Warplanes in the first place comes slowly.
Then warplanes accelerated in each stage.
The game has 4 step. The first step may sound easy for each cut.
However , especially 3 and 4-th stage require more speed and attention.
Message appears at the end of each stage:
Step 1: Congratulations! Step 2.
Step 2: Congratulations! Step 3.
Step 3: Congratulations! Step 4.
Step 4: Congratulate, Super speed and attention! Play Again

If you can pass the final stage and you could see the last message , you're very quick and careful.