Hi Ntext4ever! We are using InputMaps for now as we were not aware that it could be an issue with other systems. We are lacking the possibility of testing fully on Linux and Mac for now, we need to address this issue. As I said to BristledKing, "press A" is for gamepad ^^' it's a bit clumsy of us, I'm sorry about that. But Enter should work!
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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!