So I just tried the game for the first time, and what hit me was the scrolling from moving the mouse to the edges of the screen or with arrow keys "jumps" rather than being fluid and continuous. Whenever you touch the edge of the screen, it moves a set amount slowly then stops, rather than moving quickly for as long as the mouse is at the edge of the screen. 

I could kind of get used to it but it's pretty horrible. It can only approximate how much you want to move the camera and feels very unresponsive.