u need to go down the 2nd ladder, and there, u can avoid the ghosts by jumping in pots, go all the way down and through the portal, and go to the stone thing and then u shud get a key, use the key on the locked door, thats there, after you go back up the ladder(you need to go right a bit) but you'll see a door, in there is a save fairy guy, and this cask thing, press up on the cask, it'll bathe u in this liquid which makes u invincible, right after u get that, make a mad dash down the first ladder, and to the portal, then try to get up, you will encounter a boss, after you beat him you will be able to kill the ghosts, straightfoward from there