Afraid I ran into some problems on Linux (Ubuntu 20.04). The game launches and runs fine, but the pistol doesn't do anything to enemies (shots go where expected but pass right through them, and the particle effects I'd expect where a bullet strikes a wall appear somewhere way off to the left of the right). I can't seem to possess enemies either: the screen just goes dim for a moment no matter where I point/click. It's a shame, because this looks like an interesting game.