You guys should reconsider using Z and X for default controls

[Mors]

I'd go a bit further than that, just add customizable controls. Everyone has their own preference when it comes to keys and not every setup works on every computer. Layouts like Z + X and A + S don't work on certain keyboards because of either different keyboard layouts or what BM said. And Shift triggers sticky keys on some computers, a lot of people are dumb enough to be unable to disable that. People also seem to hate that Shift+ Control configuration for some reason, I got a lot of complaints on the first engine test so I switched to Z + X and now I'm getting complaints about that as well lol

So the best solution is really just adding customizable controls. The system is there for Flashback but since the UI is not done yet I had to stick with a premade layout.