Works well enough for a game coded in a short time frame.
However I have to say that it's a bit TOO similar to Osmos, while lacking all of the subtle audio/visual cues that make Osmos a great game.
There's nothing inherently wrong with copying gameplay concepts, but you should strive to do something that sets your work apart. If you're copying the gameplay very closely, perhaps use a different visual style or setting (maybe do an 8-bit "demake" or similar).
A bit too similar, no? At least give some attribution somewhere.