Great Job
Excellent arcade shooter, game play is smooth and graphics really well blended. Godd powerups but maybe short, something like a bomb or multiple shot (even timed or 1-2 shots) it should have been a great addition to the powerups collection.
Well done allowing players to choose movement between w/a/s/d or arrow keys, however the option to move your ship with mouse is something i think it makes the game faster in game play, but this is personal, each player has his own skills with mouse/keyboard.
Great game overall, keep it up!