I had to spend 6 bullets to break the wall, then 2 on one guy, then 2 on another, and I was left completely without ammo. The game said I picked up ammo when I walked over one of the enemies' AKs, but for the life of me I couldn't find how to switch to it, only how to holster the revolver. Maybe I just didn't explore enough and there was an AK lying around that I could pick up.
As others have mentioned, picking up notes and immediately displaying them on screen is sometimes annoying, especially if there's also an enemy in the room and you can't see them because you're too preoccupied with the newspaper you just found on the floor.
Those issues aside, I really dig the environment art and design put into this game. Feels delightfully old school, like I'm playing Sin or Soldier of Fortune or something along these lines.