Your Ship
When your ship is first launched, it has only basic abilities: Turning, Thrusting and Shooting
In order to move your ship, rotate it to face the direction you wish to travel and press the thrust key. Of course the ship has momentum, so you will have to compensate when you select the angle of the ship. Thrusting uses fuel, so you should not use your thrusters more than necessary.
You have an unlimited amount of ammunition, so shoot away. Only limited number of shots can be active at once, though. If you repeatedly shoot and miss, you will find that you are unable to shoot until some of the shots have expired.
Your ship has a limited amount of fuel. When all the ship's fuel has been consumed it is unable to thrust anymore. This leaves you immobile, but not defenseless - you can still rotate and shoot.
Fortunately the asteroids occasionally release fuel when they are shot. Fly your ship into the fuel symbol to collect it.
Fuel Upgrade
Fuel Upgrade