Click the green flag to start, Move your mouse to change the location of the Ghast, Click the Ghast to launch a fireball at the Zombie Pigman, If you run out of fireballs you loose, if you kill the Zombie Pigman you win
A big thanks to everyone who help me fix this when I couldn't figure out why it wasn't working on this forum thread. https://scratch.mit.edu/discuss/topic/235611/?page=1#post-2401963 Thanks again to @gor-dee, @Despicable_Dad, @FiveCubed, and @nonethenones for making this game possible.