The game is called "The Way of the Ninja". You may have heard of it. This is quite possibly the hardest game ever made. The game is available for free download HERE. I'm stuck on episode 5 ( 99 total episodes). It's a pretty fun game, however  it will cause frustration. You should try it out. It may be easy at first but it gets pretty difficult after the first few episodes. Good Luck! 

Just played N plus (plus sign doesn't work) with a friend yesterday and a bit singleplayer today xD

How far have you gotten?

I hate these types of games...they are so incredibly hard.

I couldn't even pass the 1st level

N was out on XBLA 2 years ago. why the interest now?

Good game though I wouldn't say it was that hard.

around 20-25 episodes in the XBLA version

I have N Plus on DS, it's AWESOME.