This was such a cool game that I actually found myself playing longer than I had intended. I thought it was a normal western shooter and then the little twist that comes mid way through really grabbed me in. I didn't get to finish it because I think it glitched out for me at the end, but I was really engrossed in the game you made. Great job!
Some feedback if you wanted: I had to move the gun anytime there was dialogue since the UI was behind some of the in game assets (like the gun). I would probably move the UI to be the top most layer so this doesn't happen. I would also try and incentivize the player to try and shoot around a bit more. I found myself just finding the object that gave me the most points and just kept my mouse there and clicked away. I also never found myself running out of ammo. Did I miss something, or was there something in the scene that refilled it for me?
Otherwise, this game was a lot of fun and more people should play it through. Great job!