Just like the first, a game with amazing style and gameplay. Really fun combat, and way less clunky controls than the first. Although it is really fun and well made, and a massive improvement over the first in every way, it's still hampered down by the developer trying to execute certain ideas that don't work out well mechanically. I have never had a fun boss fight in this game, and some of the levels are annoyingly designed. Still, it is way more fun than annoyance in the end, and the aesthetics are even more improved than in the first. A really interesting story which answers all the questions of the first game and more.
The hit detection was (mostly) fixed! However, the level design definitely took a hit. There is just a lot of levels that are either way too long, have areas where enemies can just kill you with out you being able to see them, or both. However I like the story a lot and the core of the game is still assloads of fun. Oh and the custom campaigns on the PC version were a great addition. But yeah play Katana Zero.