Wanted to update. I have finished the first boss and the first level of chapter two. I have also added the ability to change the volume of music and sound and I've changed the design. But before the upload was finished Greenfoot said:,, Upload failed: The scenario is too large." °~°

Therefore an Actor has to be in the world. You can create a new Actor, but then I have no idea how to put him into the world to get the World.