This game is SCREAMING for controller support. The game is lagging right now and that's fine, its Alpha, I get it. But, a mouse is almost unneeded the way that they have set up the game play. I would much rather use the left and right arrow keys for the left and right mouse button.
The highlighting is frustrating because you move your mouse and expect the highlight to follow it, but it does not. If the game is going to use the mouse, I wish it would USE the mouse.