Great game overall, short and simple and to the point. However, the issue with Mission 9 still seems to be there. I tried shooting at everything in the area, then looked up a walkthrough to see if I was doing something wrong. Apparently, I was not, so I tried it again. It still didn't work, so I tried just shooting the guards to vent my frustration. When they didn't die, I realized there was a major problem here. The shooting animation plays, but nothing reacts to the shots. Examples below contain spoilers.
Shooting the tree, bottle, and fuse boxes cause nothing to occur (no reactions from guards). Shooting the guards does not kill them, does not fail the mission, and does not play any animation other than the gun movement. All in all, this is the only thing preventing the game from having a perfect score, from me.