Definitely worth a better rating than that. Still one of my fav games. Love being a ninja.
And I was right. It was a kids game. But one of the few kids games that can be enjoyed by anyone. I thought it was really fun to play, and the imaginativeness (is that a word?) that came with all the levels and creatures and different costumes made the game all the more enjoyable.
I still have it to this day and tend to have a go at it at least once a month. Severely underrated and prejudged due to the fact that it is aimed for kids and not as mature as some other games like GTA ( gimme a break, not all games have to be about shooting prostitutes)
Anyway. Love it.