Even though the game is titles Ninja GAIDEN, when you open it the game is titled Shadow Warrior.
You run through the levels and hit the enemies with your sword. You can also jump and cling on to walls.
Most enemies just walk along and swing their weapon, so are pretty easy to kill. There are what I think are dogs and these move very fast and always seem to get me.
After playing for about 5 minutes and getting on to level 2 the game crashed.