Review.
Pros:
I honestly don't have much to say here, unfortunately for you. The sound effects are for the most part pretty good, excluding one that I dislike, but I'll get to that in my cons. The space ship you play looks very well, I don't know if it's a sprite you found on the web or if it comes in GF2, but it looks good. The meteors and exploding effect looks good as well.
Cons/Recommendations:
I really don't like the sound of shooting. It sounds like somebodies knocking on a door or something, which is really far from what I imagine a space ship to sound like when it shoots. I recommend you make it sound more realistic, like a gun, or change everything, including what the shooting looks like, and make it into a zapping sound, which is what I'd imagine a space ship would shoot.
I really don't like how the background is a brick wall. That's very unrealistic as this is based in space, it should be a space background. If you'd like, you can PM me and I can link you to a tutorial on how to easily make a space background.
I didn't like the effect you got when the ship exploded. Sure it looks cool, but it always leaves behind some of the animation, the meteorites do the same thing, and it's silver, why doesn't it look like a normal explosion?
This is a very big con and makes the game very unfun. As mentioned in the review below, if you just go in the center and shoot, they Meteorite's never go anywhere. They never even come close to hitting you. That really takes the fun out of the game.
Another big thing is that the score seems to be messed up. It appears to just be quickly going from 0-100 and restarting. That's a major thing as I would think the main point of this game is to try to get high scores as there are no levels.