I like this game. Played v.6.1. Btw, a little bit hard for me. Pros: Zombies are smart, chase you and harm to you. Hear little sounds coming from you and immediately attack. Cons: Jump and crouch mechanics should be added. Because, objects around us won't let me escape. If player could quiet walk, the zombies wouldn't have easily noticed us. Additions: Hiding areas like closets, under the bed etc. may be added.
Thanks to the marcin4001, keep going, Good Luck!