Looking for the name of a game

Hello,

I remember playing this game very very long ago. In the game, I was playing a ninja, and looking at the ninja from bird's eye view. There was many chapters in game, and if I remember right, at each end of the chapter, I had to kill a boss, more powerful monster. There was an old man with a beard, and he was giving me lessons, truths about some ninja stuff, life, etc... After finishing the game once, a better mode would be unlocked. We were a more powerful ninja, and able to kill monsters more easily. And it didn't have magnificient graphics, it was like a cartoon. Now, I can remember that much, I know somebody have played this game, please tell me what it's name was.

It was a free game, and it needed 20-30 MB to install. Not Ninja Gaiden, but thanks:)

I couldn't find my game in it, but thanks anyway. It seems that I will open google, type "ninja", "samurai" and look at the images

Thanks for the recommendation I will give it a try. :)