This game is pretty cool, and really well made for a month long game jam. The game reminds me of Unturned a little. The UI and audio really impressed me. It really brought me into the game. And I didn't know you can build levels of that size for a browser. Really cool you have a save system that picks off where I left off with the items I ended with. Do I really see two languages are supported? Wow!
In the game, while I didn't get too far, I ran into a problem in round 4. It was kind of dark, but not as dark as when I entered a building. I think I was running low on health or something, but when I entered the building with stairs, I pretty much couldn't see anything and was stuck in there and died an honorable death.
I also want to know, are going repost your project without it being in a zip file? I downloaded it and tried unzipping it, but I ran into extracting issues and everything breaks. Maybe I am doing something wrong, but I am not sure. I am interested in some parts of your game and want to look it. Mainly just the code part.
In the end, I had fun running around and exploring things. I tried to bring down the NPC with me while we were chatting during the nuke, but he seemed immune to the radiation, though, as I laid there dying.