Went ahead and made due with the browser version. Pulling off a 3D fps for the first time during a game jam is impressive. I liked the ideas here too. Choosing one weapon for your run instead of having them all is interesting. The choice changes the feel of the game and gives replay value. Having to stay near the fire was a very smart way to deal with the lack of any walls or level. It could have just been back strafing while firing forever but the fire forced me move in more mindful ways, make decisions in each moment if the cold or the enemies were the bigger problem, and have to walk towards enemies when the cold was the bigger threat.
I did have some problems with the weapons actually hitting the enemies. I feel this could possibly be due to lower frame rate I played at due to my older computer. Felt like sometimes my shots were just passing through enemies and doing no damage. The sniper especially felt useless. I found that most of the time spamming melee attack seemed to be the best way of dealing with enemies. Didn't manage to survive very long with this problem. So maybe check and see if the game is programmed in a way that frame rate effects hit detection.
As far as design, the only thing I think would be nice is some hud notification of where enemies are hitting from. Getting hit in the sides and back was a little annoying spinning around trying to figure where I was getting hit from.