+ I love the art style
+ Great enemy behaviour
+ Horror enough to make me shiver when I'm being followed knowing I 
    will have to replay everything :)
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~ Could have added some background sound (wind, reactor, etc.)
~ A little confusing why I can't pick up the gun
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- Ending could be improved

---------------Suggestions-------------------
Maybe add a random level generator ?
Make it a roguelike ?

Anyways great game :)