just tried it. Nice look, was missing the mouse at first. Setting the keyboard was a bit unexpected - being able to set a second key for things would also been nice. These are no problem compared to the lags. Sometimes it's fluid, sometimes the game just hangs - I hear the sound of crashing but see no new frames. Happens often and seems like loading parts of the map or something. Uplayable for me.
Tested with Kubuntu Linux 5.15 i76700K GTX970 32G Ram M2SSD