The game is not bad, but should be developed.
It's a really hard game. Aiming spaceships looks totally impossible. Every 3s i explode because i press left, my ship go left, i release it, my ship rotate backward... and i fail my shots.
And pressing at any time the spacebar is really annoying. You can do two options :
-> Automatic shoot (the ship will always shoot)
-> Using "Is pressed" event instead of "On pressed" trigger.
Nevertheless, the speed is interesting. Maybe some players will find it too fast, but in my opinion, going fast with a spaceship is really cool. Graphics and music are nice.
Continue like that ;)