Great game but..
Great game but... It need some fixes, i suppose that those asteroids are randomly generated right?
Anyway sometimes they get generated to close and appears as a wall wich you cant get past, thats to bad... Might need some fix is there is any possibility?
The second thing, i notice that those lines are flying in the bg to give the game an speed effect, to actully give the speed effect you might need some improvments there.
First thing decrease the size of the lines.
Secondly increase the speed of the asteroids, and give the game screen a bit och.. Shaky feeling, deppending on movments, i hope you understand what i meant.
Anyway the game got a pretty good idea. Nice work btw