Love the visual gag of the unlockable black silhouette that just happens to be an actual black silhouette ingame. Really took me off guard.
The whole thing is very reminiscent of games like hidden in plain sight, or assassins creed/watch dogs multiplayer. neat idea. Realising that an NPC is not moving randomly but actually following you is always a nice moment. It's a bit sad it's so rare : most of my deaths were during the short stun right after I killed someone.
Very nicely done overall.