I just completed the gameI can say that it was pretty well made. Only problem was that I had this "bug" that caused some actions to continue until the button is pressed again (for example moving forward gets stuck until I press it again). It might be caused because I'm playing with my laptop, but maybe others are having similar trouble? It makes the game really awkward to play and causes me to lose all my xp for mistakes that weren't caused by me.
I also feel that the diversity of enemy monsters it guite scarce, but the different variations of fast and slow zombies(?) helps a little.
Also the comment below mine from Aderta, I'm not sure but it seems he didn't try shooting the boxes with a pistol.
Anyways, it's a nice game and I hope you find the will to make the part 2! I hope it will explain more about the events that led to this scenario. Playable flashbacks perhaps?