Nice start. Now Execute.
We have seen many of your games across the internet, and I, personally, would like to see it have a twist. Score, life system, upgrades are all standards. HOwever, what if you could put down a storyline (For example, reaching from point A -your base- to point B (Nuclear station, black hole, etc, and you have to move through the increasingly difficult meteor fields (dodging them rocks, add enemies too), in order to reach it?) maybe also include several bases along the way to add to the plot( skill sale, intel, NPC aid). I think you have a good start. I like the texture skins on the rocks, but i think you can improve on the player skin (the ship) and the background. Nevertheless, this isnt half bad for only spending a few hours on.