Cool. I like the colors and movement. 
If remember Asteroids, any time the ship went off screen, it appeared from the other side. I think that would work for your game too. Adding some  inertia would make the movement feel more natural.  
I did find the mouse difficult  for controlling the paddle. What about a key-down to rotate clockwise, another key to rotate counter clockwise?  
Great job, it's a cool concept