I tried my best i beaten the level 28 and i just cant do more.unbelievably hard.
there are 39 levels altogether but you have to finish in order to unlock the new ones.
i have to admit that i cant go passed level 29.and that is the end of that.it get so hard that you have
to think and say ok i will not do the rest of the level.
but there is a balance in the mission from the start it is very very easy,and until the level 39 that i will not be doing,due to the difficulty of the game,i completed the level 28 and thats it.no more.
if you are not a patient and calm person,then dont buy this game and dont play it ,other wise you will end up breaking the poor DS.:D
the game is pretty much fast and quick.and you will work just like a real ninja,you can jump on walls and so on.the difficulty on the last 10 missions in amazing.