Great Game.
Enjoyed playing it, the fact that you can't assassinate the guards made it challenging, what i also liked is how the guards go looking everywhere, i don't think in real life if someone was dead people would just go back and forth in a pattern looking for the killer.
I think if your going for a Ultimate Assassin 3, you should put difficulty modes, where if you were to choose a harder game mode then you cannot kill guards, and guards would be more persistent.
Anyways had fun playing it, thanks.