You are a ninja! There is only one aim for your life now, defend the poor little blind girl.
It is not an easy task to do, that girl is being attacked by other ninjas over and over again and you have to move from one side of the valley to the other and hit those bad ninjas.
This is actually an "upgrades games" where you have to complete each levels and then go to the shop and upgrade your abilities in order to continue and with the next levels. The game is pretty fun to play and very addicting.
It is always nice to know you are helping the weak and the poor and there is no better option than helping a poor blind girl.