The UI feels difficult to work with on PC. I know a lot of the UI's clunkiness is that way because the game is targetting mobile users, but on PC it really shouldn't take so many clicks/tab switching to do some things.

A good example would be switching mirror modes, it's a bit of a faff to drop the part in place, click on it, and open the corresponding mirror tab, then if it doesn't work out I have to re-do the process to alter the symmetry each time... rather than just having a keyboard shortcut or a tiny icon on screen I can click at any time even if I'm in the middle of dragging a part around.

Keep up the good work :)