Did you use a mouse or controller? What would you change on the control? We try to please everyone's needs with the control. Probably there will be some option for that. (this mouse control is the 5th version of it)
How you been you can rotate only 90degs? Can you make a video about it please? That would be a big help. We tested the game with several Linux distribution, but no one reported this kind of bug yet. Soo you are our only source to fix it :)