Okay, I don't get it.
Theres basically only left, right and space. I can unlock new lockers and "skills", but how do I even build/change lockers?
Either I don't get the skills, or don't know the hotkeys, or anything, I can't find anything in-game.
I thought maybe a Linux problem, but it's the same in the Windows version.
And I don't really know hot to expand to other lockers if I can't create new ones either. 😭
Edit: Okay, it's "R", and you need to upgrade basic ones. This should really be listed in the help menu. :-(