Pretty good...
The game looks good and has easy to use and fully working controls.
But where is the sound?
All right it's a space game so no sound is more "realistic".
On the other point... Does the level layout ever change?
Or is the only difference in gameplay that the amount of Asteroids increases. If that is the case a couple of different layouts would be great.
And lastly. The pickup part seem a little buggy... sometimes when you pick up items the automaticly warps to the drop of point even if the character's not even close to it.
So fix the small issues and this game would be truly nice.