Good, but too hard.
Essentially it's just way too hard. Now, I don't mind hard games, but the thing is that what makes this difficult are the controls. They are very unresponsive, and in a game like this, the controls have to perfection or it's BACK TO THE DRAWING BOARD.
Oh yeah, there should be a key-stroke to retry. It's really annoying to have to move your hand over to the mouse every time you get killed (which is often).
I was gonna give you a six, but then I added a point for originality.