Okay so first of all: It works beautifully on Manjaro Linux, no Linux-specific issues at all.
Love the lighting and style of it too, looks fantastic.
One thing I would like to see, is numbered buttons for character abilities. So I can quickly tap a number with the mouse hovered over an enemy, so i can click right away to use it. Having to mouse over the ability, click it and then mouse over the enemy and click it works against the flow a little.
I also think right clicking to cancel the currently selected attack would be nice.