You did a really nice job here.
I liked a lot the art and the glowing effect you had. The music is nice too, did you do it yourself ?
The gameplay is fun and works well, and the score gives a real plus in playing the game by giving an objective.
The main downsides for me are the fuel: don't think it has that much to the game, and it feel a little bit frustrating to have to think about limiting you movement in a game you have to search for enemies. Also, the ship is a little bit hard to control, maybe reducing the speed faster when not moving would have done the trick.
Overall, it is well polished for 1 week !