Note: The question code must be unique across the same survey, must start with a letter, and can only contain alphanumeric characters. If you ever try to export your data to SPSS or R, you will discover that the "qcode" becomes the value label, so you have to make the code unique. For the time being, LimeSurvey will support legacy code values, but the Show logic file button will color code such questions so that you know to change their names.
Hint: You can also use the HTML WYSIWYG editor, which offers a GUI to perform the most important tasks such as using different fonts or sizes, including images, etc.