Wow, I was blown away by this. I did not expect to play it for a straight hour. At first, I thought the game ended when I absorbed the asteroid field, but then there were stars and planets!!! My one concern is that each time I died it was so rage-inducing that I'm sure the people in the next room were slightly concerned... Maybe add in health so a hit isn't an instant kill? Or make the other black holes move a tad slower.
My game is similar in concept to yours, you should check it out!