Quote: "I didn' even get pass the two first demons. Just didn't understand how. Are you supposed to shoot them (they didn't die even after I shot them again and again)?"
first two demons?
lol u missunderstood there is only one demon in the game
and its not an enemy its just a puzzle to solve to continue the game.
i think you ment the first two monsters...
Hold down the [Ctrl] button on the keyboard and you'll
enter aiming mode, aim at the monster and press the left
mouse button rapidly to kill the monsters.
they're easy i think, unlike the last boss.