I dont have a very indepth review of the game, however I will say it was a great experience. The only thing I have a problem with is that the individual levels are too long to be comfortable to play in a single sitting, while the game itself is relatively short, i.e. there aren't many levels. That being said, it was a great game, the controls felt just right, very intuitive and you really felt like a Ninja.
Even after 14 years, the game still has its magic. Playing with the unofficial patch, the game is super fun, and the endings are awesome. The characters are great and the voice acting is lit. The Deb of Night is probably the best ASMR I've ever heard. All in all, a great experience, especially for the 20$ pricetag. Recommended.