I liked the idea of two worlds and horror theme fits to that.
Moving around for so many steps was tiring. I couldn't get past the white blocks so I went back for the "normal" world, then came back and nearby the blocks the world changed again and I quit because didn't want to go back again ;)
The biggest bug I found must be that dropping partly used ammo and picking it up again restores the ammo to the max. Feels like it uses the ammo data instead of runtime data?