Review
Ninja Gaiden III is a commendable port of the NES version, but some details have been lost in the translation. The stage backgrounds are still incredibly lush with detail -- so much so that elements in the foreground sometimes get lost in the background clutter. It can be a little hard to figure out what your small character is doing. You may think he's curled into a ball and suspended in midair, when he's really hanging off a wall that blends into the background. The power-up items suffer the most of all. It's very difficult to determine what they are unless you watch their blinking very carefully.
The game's music is horribly grotesque. Thirteen banshees all wailing different, off-key songs would only begin to approach just how bad the music is. The songs in the game are definite candidates for worst game music of all time. Since the sound effects are simple and bland, it's probably best to just turn the volume all the way down.
The gameplay is what one would expect from a Ninja Gaiden game. The series provided some of the best 2D action on the NES, and the Lynx translation is no different. The controls are smooth and responsive, although it will take you some time to get used to the floaty nature of Ryu's jumps. Special ninja jumping technique, no doubt.
Ryu can climb walls as well, and in some stages will have to do so. Learning how to climb and jump on and off walls effectively is one of the key skills necessary to beat the game. Success also requires some forethought and a bit of patience. If you try to run through the stages jumping and attacking, you will only get killed.
Ninja Gaiden III is really hard, and it will take a lot of gaming time to beat it. Even though you start the game with five continues, the harsh difficulty will quickly whittle you down. But it's a fair and enjoyable sort of difficulty, so you won't feel like you're being cheated. If you die, it's because you weren't skilled enough or didn't think things through before rushing into a new area.
Ninja Gaiden III is an enjoyable and challenging addition to the Lynx library. The presentation, with its flawed graphics and horrible music, leaves something to be desired. But otherwise, Ninja Gaiden III is worth your time.
Graphics 
Porting the graphics from the NES version is good in theory but doesn't work out in practice.
Sound 
You simply cannot find a game with worse music.
Enjoyment 
Solid, challenging 2D platform gaming.
Replay Value 
There's no random placement of anything, so once you memorize the patterns, it's easy to beat the game.
Documentation
Decent instructions.
