Really good game. Nightmare mode is an amazing addition, exactly what the game needed. Since arcade mode seems a bit easy.
Only problem is that nightmare seems unfair in some cases. Like with the resident Zoth Ommog. He can be a doppelganger with "wrong eyes" but doesn't open his eyelids, you can't see them. "Wrong eyes" in general seems to be unfair because you can't see the colour of them through the picture. And i can't tell the difference when it happens. But otherwise it's pretty good.
Interested to see this game develop further.