The Bomber: An innovative puzzles from China campus

The Bomber is very popular on campus Chinese intellectual game, it requires some logical thinking ability, simple and fun.
I put this game into a single rewritten version,using a random map, allowing you to play at any time. Now to challenge your logical thinking skills now!

How to play:
1. Each stage have three planes in the map.
2. Find and destroy them all, you win.
3. Each round, the remaining planes will attack you, each plane will make you lose a 1 point HP.
4. HP is 0, the game is over.
5. The plane hit the head (red dots), this plane will lose the ability to attack you.
6. Every game you have three lives.