Deleted 262 days ago
You need to try to keep going south and west. But eventually you'll reach a screen where you can see a cave within the cave over to the left but you can't get to it. Go back one screen and you'll find a second exit on the southern side over to the right of the one originally. Use that exit and you'll eventually be able to work your way to the left and that cave within the cave, which is where the boss is.