Nice game. I tried it on Mac.
The concept is cool, graphics, music and SFX too, but... the core mechanic (flying the ship) was a bit broken. As it was said in the other comments, the ship speed and rotation are too fast, it's quite difficult to go where you want, especially when the target is moving as well. Also, can we slow down the ship by pressing the "S" key? It didn't work for me so I had to rotate the ship then move in the opposite direction.
My advice for your next game: focus on the core mechanic, what the player is gonna do 80% of the time. When that part of the game feels good, then you start adding more content. (oh, and I must remember to apply that to my own games too! :)