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Open the editor and read instructions

Copy/Import the "Create" code on a level that's before the level select (Title screen).

Copy/Import the "Select" Code in the buttons you use to select a level. Please read instructions and don't lock the first level...

Copy/Import the "Complete" Code in the player or in the Goal for that level.

If "Create" and "Select" are in the Same Level, then please use the Globals as instructed.