Very nice graphics and lots of mission variety, that's ultimately ruined by the game being way too hard. At least you keep your power-ups permanently but man the game is needlessly brutal. All enemy boats are faster than you when they want to be, get attacked from all sides, have knockback and hitstun meaning attacks can combo you, your health meter doesn't update right away for some reason, some attacks just do so much damage...among other things.

If the game were just a bit easier, it could be considered a classic NES title.