Hold somewhere to create marbles! Remember: more marbles = more lag Press E to clear all marbles! Press Q and A to change marble size! (can only do that when there's no marbles. Press M to change modes. Go to "See Inside", then "Hitbox" on sprites and edit the background. Then press flag for the result! Add mode: Hold somewhere to create marbles! Delete mode: Click a marble to delete them! Edit mode: Click then hold a marble to change their positions. Put them on the trash icon if you want to delete them.
I had this idea and I made it! I gave up once because there was some glitches, but I fixed them!