I have to say that I'm really impressed by the demo so far! It's noticable that you have put down a lot of effort in your presentation! I like the menus, and the logo! Everything looks very professional! For some odd reason I couldn't hear any sound though, whatsoever. No music, no soundeffects etc, but I guess I did something wrong when installing the game or something.. I'm not sure.
I really like the setting as well, and everything about this secret organization that you slightly get too know about. I can't help it, but I got a little 'Crysis' feeling about the cyberdrone exoskeleton thing, especially with the replacement of limbs and such! But that's just really interesting to be honest, and I think your story is very promising! I also get a little Metal Gear feeling over the whole game, and I thought a lot about Solid snake when playing, but instead the game resolves around Ninjas. I also thought a little bit about Syndicate wars with those pictures of the exoskeleton soldiers killing innocent people. It's like a combination of awesome features put together into one single game, and I like it a lot! I think everything is presented really well, and your mapping is truly awesome! I Especially enjoyed the first town, where you mission is to get medical kits and play tetris and all that, had a lot of fun with it! Like I said before, your menus are awesome and looks truly professional, great job on that!
I also like the battle-system so far, the tap the directional buttons were a bit annoying at first but it felt pretty good after awhile! I guess that this feature will be usable later on though, and that it will be something that's needed for special missions of sorts. Currently I'm on the first mission, and man I can't wait to get further into it, It has a really cool feel to it and I enjoy the infiltration sort of system on that mission!
I'm going to play the rest of the demo later on, but I have to say I'm impressed and I'm very sure I will have tons of fun with this game! Very well done on your part!
I also found a possible 'bug', it might be nothing but I thought I should point it out anyway. When you get into the sequence with a brief history about the Yakuza organization, and the exoskeletons. The screen will freeze and I was a bit confused by it since I didn't know if the actual sequence was over or not. I'm not sure if this is intentional but i think it would be smoother if the sequence ended without having to click the exit button.
I might post some more when I get further into the game, but I am truly enjoying this! :)