I hate killing the dogs!
I had to play the first level many times just to get a feel for the game. However, once you get this feel, the game becomes extremely enjoyable. The graphics of the game are top-notch, right up there with the Sonic series. The gameplay is amazing and the feel is very smooth and easy to master. I love the sound and music in it as well. It is cool to hear a bad-guy blow up from being killed and what not.
There are only a few things that I do not particularly like. First, the game is very repetitive. Each level feels the same. It is like they only changed the environment and added more bad guys. Second, the level design can be quite boring. Lots of times you will just go through a level really fast with your ninjitsu power and not kill anyone. It's just run and jump. However, despite those complaints, the game is very good and is one of the best games on the Sega Genesis. This is a game that you will go back to and play many, many times.