This was fun to play! Some more indication about where to look for the orange boxes might help to avoid a player getting to 9/10 and just re-visiting the same areas again etc. But the overall gunplay was good, and visually you did really well with assets. Particularly I think you did a cool job with the line of sight shader stuff - the lack of colour saturation and enemy visibility really added to the style of game you made. I'd also like if zombies noticed me if I didn't shoot, seems they thought my ugly face was zombie enough to get by as a fake-zombie!