Here is how I can imagine a variable editor, this will be cool to see if a variable creator appears
(https://preview.ibb.co/k2GEbp/Variable.png)
You can select from three different variable types: Integer (Numbers), Boolean (True or false) or string (A word or any combination of letters, numbers and special characters)
You can select it's starting value and if the variable saves locally or globally (If it keeps from different areas or each one has it's own.)
You can also select if a checkpoint saves it and when you die, it will return to the value at that moment, or you want to delete it or keep the value when you died.