I don't know how to preventing the hitman from killing me; I kept the window always closed, I scanned PC, I used the VPN but he still appeared, and when I hide under the bed he catches me.
The game is ECTREMELY promising, but for the next updates I would focus on how to evade the hitman.
Just suggesting tho, I like the game very much and it's only the free version, I have huge expectations!