With the exception of the music, this game is NOT good. You are never given any directions, and the things you have to do in order to proceed in the game are often the most stupid things imaginable, such as locate a guy hidden behind a bush in a village. Besides, as others have pointed out, the main character looks like a lego version of Link and his main enemies are bubbles!
Even the well-written music gets annoying after a while, because of the horrible Mega drive sound ship.

If you want a good Mega Drive game, buy Shinobi 3 or gunstar heroes instead. To be honest, they are the only Mega Drive games I have really enjoyed.