Great game overall. Only thing I have against it is the need for scrolling. Be nice if you could just control the Samurai with A and D and have the screen a little wider. Too many times I died from having to scroll off the character and no auto pause when I accidentally click outside the game.
Other than that I will give it a 4/5. 5/5 only when wider and auto pause.
That moment when fighting last boss, the killing blow to your ship was at the same moment you dealt killing blow to boss.
Mutually assured destruction, and still saved the earth.
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 "Straw Hat Samurai"){kind=icon}
 "Boss Slayer"){kind=icon}