Decent side-scrolling platform/adventure game.
The controls can be frusterating at times, but once you master them it's a breeze. It will take you about half an hour to an hour to get used to them, and I warn you, you'll die a lot before you actually get too far so don't get angry.
If I remember right, you have to save a girl from the final boss, just like in 90% of Nintendo games. But I could be mistaken, been a few years since I put this in the ol' white box.
The difficulty at first is hard, but then it gets to about medium once you get used to it. Basically you have to complete certain events around the main area of the level until you make it to the next part of the level, or the boss. Check out the shops too when you have enough money in it.
Basically the most annoying part of this game is the music. One or two of the tunes are pretty good, but that's about it. As far as sound, it's not too bad. But a game would be boring without sound though, so you have to give it that.
It will take you less than 3 hours to beat it once you get the hang of it, maybe only 1 hour. It took me about an hour and a half, but it can be fairly harder if you're having troubles at a part. But that's what Gamefaqs is for, I had to check it out once 'cause of a part I got stuck in, so you may have to check there if worst comes to worst.
Personally this is one that I enjoyed, if you like a game where you have to buy and collect better armor, swords, shields and more, this is one for you to get. Go for it, what do you have to lose? :>