Loved the artistic direction, great use of the 4 colors. Game is straight forward and easy to pick up. Overall its a clean fun game, could very easily be expanded upon with more baddies/powerups./levels. Would have liked to a see another enemy or two besides the masses of robots, but I did enjoy having dozens of them on the screen.
I did find clicking caused me to fire much faster than holding down the mouse button.
Great Entry!