you are fighting some dude idk why. Click on fight to take away from the other dudes health, and heal to give yourself more health. There is a cooldown. TRY TO TAKE AWAY ALL OF HIS HEALTH WITHOUT LOSING YOUR OWN. Events give you bonuses. They just make attacks and healing do twice the damage/healing.
all me. just a small thing I made. IT IS POSSIBLE! You just have to get lucky. I have beaten it before. IF THE GAME DOESN'T WORK, JUST PRESS THE FLAG AGAIN! :D