Man this is top notch level design, feels like a natural expansion of the original mod, a alternate take but great. Decent length and difficulty.
Parts of it reminds me of Afraid of Monsters, there was one part where you have to sacrifice the lantern for a mobile phone (yeah big deal) you should have been riskier and got rid of all light to be honest. Eventhough I hate pitch blackness it would show you have guts to follow your vision.
Also complete fail for the custom monster. I hope the bug doesn't effect other monster_custom entity using mods. Although the ending was nice.
