It's perfectly competent. The sprites and backgrounds look good, but occasionally stuff gets lost in all the visual noise on screen. The music is nice and groovy, if a bit forgettable. I remember way the game handles being a bit frustrating to deal with, but I guess that's appropriate for the throwback style.

The best thing I can say about it is that it feels the most like an old NES game out of any feux-retro games that I've played, for better or worse. And as someone who (with a few exceptions) mostly tolerates NES games instead of enjoying them, I'm probably not the target audience for it.