Hello! Thanks for replying. InputMaps are the best method to handle input in Godot, as far as I know. I don't think my issue is related to them. As I said before, I tried pressing Enter, Backspace and other keys on my keyboard, but it doesn't work. About testing on Linux. May I suggest you to use a pen-drive with a live install of some distro? You could actually do testing in a real Linux system whilst not needing to do a full installation. Thanks for all the support!