Glad you enjoyed my little game! It's not too difficult in Godot, I've found 2 different ways of doing it:
- The fast and dirty is with a TextEdit node with the coding functionalities disabled and another TextEdit below it with editing disabled where I put the guiding text.
- The proper way is with a RichTextLabel because you have much greater control over displayed text, color, size, etc. Downside is you have to setup tracking in func _input() for keyboard keys and update the label accordingly. Also have a guard clause that stops the process if the node is not focused.