The punching battle system was good, the story was solid, though I'm a bit confused why 47 went all 'huh' at the end? I feel like I missed something there. (Also why was he walking all the wall or was that the joke?)
The only bug I could find was that at the beginning it looked like there were some empty text boxes. I'm not sure whether those were intenional or whether something was loading slowly. (I played the web version in case this helps.)