Very intriguing concept, and I've played a bit of the earlier alphas too. I'm having some issues with the camera on Linux though, that has been present in the previous builds as well. It's much too sensitive, making it very hard to control precisely, and in this new build it also occasionally gets stuck (haven't noticed this before). Like in the when you go down the stairs in the beginning of the game, I'm always unable to point the camera downwards, unless I first flip it up towards the roof. When I'm walking down the spiraling stairs, the camera will also with regular intervals stop being able to go to the left, so I have to flip it once all the way around to the right to be able to point it left again.