Thank you for your feedback.
I tested the game on my laptop with an i5 6400 without a video adapter and 8GB of RAM and the game ran well throughout the story, even at 15 FPS. The problem you described with the shadows is related to the Lumen technology in the UE engine itself and unfortunately, I have no control over it.
As for the gameplay issues you described. Please remember that the game is still in very early stages of development and many things will change, even what is in the game. For example, in the next update, I will add an implant system that will greatly change the action part of the game.
For more details welcome to my Discord