I stopped playing NES games.. They pretty much all suck with horrible graphics and THEY'RE HARD. I've noticed that they make the games harder than hell so that they take forever to beat, whereas newer games are much easier, but have much longer levels. When you can't have the graphics, use difficulty instead.
I don't find the games really fun, more stressful than anything else. I just can't stop doing it though because I HATE being defeated.
I've been about ready to punch the monitor more than one time because they're so frustrating.