Oh my god! This is awesome! At first I didn't play the tutorial, so I had a hard time understanding that you could actually ride in that yellow car! It reminded me of Grand Theft Auto, but with a darker tone like L.A. Noire or Mafia.
The story is original. It could be a script for a Hollywood movie or even a novel. I think you should try that! It has got all the right components. A damsel in distress. A hardboiled detective falling for her. A psychopath without a heart, who kills women and steals their hears! A mafia boss running his own agenda. And in the midst of it, a beautiful game with elements of driving car (GTA), interacting with people (Skyrim), a murder mystery (L.A. Noire) and an excellent soundtrack!
I loved the part where the hero and Vera go to the dance floor on the valentines day. The background music was awesome! Keep up the good work. By the way, I also saw your profile and played some of your other games like Extreme Times and the Ghost of Paris. They're also quite fascinating.
** SPOILER **
By the way, I found an easter egg, there was a cola machine near the Doctor's clinic, where I could buy medicines. It helped me during the final fight. There was no mention of that in the game.
** SPOILER ENDS **