I think that there should be a confirm page or something that lets the user know when he may accidently delete a sprite for when you delete sprites in your project because it is very frustrating when you accidently delete a sprite that has a lot of code in it.

but if you click the edit button in the left corner in the editor you can put it back after the sprite's been deleted. but nevertheless i agree

what if you need to delete a lot of sprites very quickly? e.g. you shared the project's turbowarp link when it was unshared and put a lot of watermark sprites so that no one can steal it, but you're about to share it and need to get rid of the watermark sprites.