ARMBE - Android Right Mouse Button Emulator does just what it sounds like. It emulates right mouse button pressed via ALT+LMB combination, because while godot released for android devices, it in no way accounts for the fact that some (if not most/every) android device does not parse RMB presses correctly. Some devices (i.e. my smart tv) treats them as the 'back button' presses, while others (i.e. my phone or tablet) do not acknowledge right mouse button clicks at all. So, this is my workaround, until I get a laptop to work during my train trips.