Press the green flag and watch and if the charged creeper comes on the screen when you press the flag just press it again.
Thanks to google for the image of the charged creeper. I'm am sorry that when Scratch Cat runs to the portal he runs a bit ( well actually a lot) to fast, I don't know why because in the offline scratch (I port all my projects from offline to online) it worked perfectly fine it was not to fast and not to slow. Also please remix but add changes when you remix. ENJOY!!!