Thank you so much for the pointers!
You are right on pretty much all of it. I will have to work a lot on the clarity, i think i'm just so used to the game so for me everything is ok so thank you for pointing that out. Hopefully i can make a proper introduction/tutorial that makes controls clear but I agree that the sprint should be changed to a dash.
The bug itself, was it in the menu or ingame too? Did the Crosshair disappear too or only the mouse?