Press the [Green flag] to start the project. This is a simple drawing but it has a shadow and an outline. Press [Space] to revert the changes and see the original sprite. I forgot to say but if you go into the editor and change the sprite, the shadow won't change immediately. You must click the [Green flag] to change the shadow.
This whole project was inspired buy @griffpatch because of this youtube tutorial : https://www.youtube.com/watch?v=KWZldY-Xtpw . Go check him out, he is very good at scratch coding!