$49.99 for a phone game? There's your problem. It's $49.99 for the same game on Xbox or Playstation, where you can play it with a controller on a much bigger screen. Normally you'd be playing it with the sound from your TV or headphones, on mobile you've usually got no sound or earphones. It's like David Lynch said, "You'll think you have experienced it, but you'll be cheated. It's such a sadness that you think you've seen a film on your fucking telephone. Get real!"
The controls look terrible as well, really complicated. It's like porting Excel to iOS, it works but it's clunky as hell because that's not what it's designed for.
Basically nobody who owns a PC or console would choose to buy a full-price port for their phone, and not many people who don't own one would be interested because of the price.