This is a shadow engine! Change the (X,Y) sliders to move the location of the cat sprite. You can change the costume the the costume editor. Shadow will automatically change to keep the format of the shadow. Press "h" to hide the direction in the beginning. The Reset button Resets the shadow when the Reset position is on "False" when it is on the option of "True" and you click reset it will reset the position of the cat sprite itself. ʘ_ʘ Welp, that't it. Bye.
Thanks to @griffpatch for the shadow effect code Rest by me @Mr_Peng
