Kengo is actually a descent game. 
more  importanty it's only like $10 at Gamestop.
if you play it ill give you one big advice to help you to enjoy the game. :when fighting the many hordes of men b4 you fight the boss of each level, Dont lock on to them! the game will play more like a action game and will be easy to play like this.
anyhow it's a descent game, not the best but for $10 it's worth givin a try  

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Relax, it's just a game