This was a challenge, or a puzzle if you will. Try to figure it out by reading this text and looking inside. Or read my explanation in the comments. Start the project and click/tap somewhere. The code is exactly the same in the two sprites, "Scratch Cat" and "Gobo". For every click a clone is created, and all clones "should" be deleted. And yet, for every click, there are more and more clones of Scratch Cat, but not of Gobo. The mouse click code is in the stage code. What makes the difference? There's a lesson here ;) This project was made entirely in Scratch, i.e. no JSON editing or other nonsense. All code by me (@kriblo).