I play anything from kid games to Extreme adult games. I enjoyed this game even though it is pretty simple. It has enough challenge on hard to get all 1000/1000 for an adult but laid back enough for children to beat it on easy.
Good: The general game play is fun. Its innocent humor but not cheesey. You free ninjas with different abilities as you progress and meet different types of enemies with different abilities, but you do get new abilities yourself. It has a cliche storyline but its still a good one.
Bad: The gameplay is repeatative. You got through a few stages, go through a castle, and kill a boss. Repeat 4 times and you win.
Ugly: The only hugely bad thing is that glitchyness of it all. The animal and Tengu acheivements are glitched. If you want thehm (totaling 140 between the 2) you should research on what not to do so you can complete these without hassle.