Interesting game. You show quite a lot of potential: the engine seems solid enough, although it's not impressive and slightly glitchy, and the graphics are quite good. Overall? 3/5, and keep it up. You'll be in the big boy leagues in no time if you simply try to improve.
The only problem I had with this game was that you went to the next level as soon as you hit the required score. Perhaps a little victory animation, giving you the chance to watch the chain you've made in all it's glory and to smooth the transition?
That's all. This is a solid little game.
I don't like the fact that if a single container gets hit, all of them are destroyed and your ship is as well. Furthermore, it's a common misconception that asteroid belts are dangerous. If you go through the one in our solar system, seeing even two asteroids is lucky. Asteroid belts have a lot of asteroids, sure, but they cover a lot of space. Overall, I give it 2/5, although the gameplay alone would be more of a 3/5 affair.