This worked for me on windows, game downloaded and ran alright. I think it is cool that you are trying to build a multiplayer type game with shooting mechanics. The skin and pack system seem to be working and running well. Gameplay needs some tweaks however, shooting worked, sound effects felt okay. However I'm not sure what we are trying to accomplish once in game. Both big turret type enemies have too much HP to kill with the amount of bullets I start with. Couldn't find any bullets on the ground, tried going into the building didn't find any in there either. It feels almost like a much harder level you are supposed to work your way up too but I have no way to do that. Smaller easier to kill enemies and ammo pickups would be a good start. Background music of some type would also really help here. It is a good start, no major crashes or bugs, looking forward to seeing what you do with this.