Lost in space

Your spaceship is lost in a space and you have to kill all the enemies to get back to the earth.
Shoot using a space,avoid the enemies laser guns and kill them all before they will got you.
If the enemy will go too close to you he will destroy you.
Move your ship by touching the arrows in the bottom right corner and shoot by touching the fire button in the bottom left corner.
The game is not easy but here is the challenge.