The first spaceship game was "Raptor" but since then, there was all sorts of awesome shooting games with planes. Space Rebel has very simple controls. Use arrow keys to steer and Z/X to shoot. If you use Z you will shoot the machine gun and the X key is a very special one.
X key triggers a weapon that can destroy every single enemy around. Once you get a sense about using these guns you will be invincible and you will know how to play all the space games you want. The thing about Space Rebel is that you don't have to pay anything to play it. Just wait for the ads to finish playing and you will be good to go. This is the reason why they call them Space Racing Games. You can never get bored by playing one!