Undoubtedly a highlight for the system, combines two different genres surprisingly well, but the biggest detractors for me were the difficulty and the immensely grating sfx. You will be rapid firing a LOT and you will hear that noise a LOT. When the game starts feeling a bit samey in the last quarter you'll really feel it with the shooting and the music blaring in your ears. I guess that's just how old games can be though. Still really interesting and definitely one of my favorites of the NES library that I know of.