It's always good to see games with sexy ninja girls...
The game looks like a Dreamcast game with better framerate, but anything else in it is perfect, the difficulty is very high, you can do incredible things like kicking missiles from jet fighters, make combos, etc. Controls are very responsive, and easy to learn, therea a lot odf game modes like survival, misssion mode, stroy mode, and a very long list of unlockables.
Best of all is the price, lessthan $20usd, if you are ready to play a really challenging game pick this one, you won't regret.