If you need help with the Twin Dragon boss, read this. There is a spot where neither dragon head can touch you. First, go to the middle of the two. Then, you will see his hand, the one closest to the middle. If you want to defeat the left dragon first, stay a little to the left of the hand, if you want to defeat the right first, then stay to the right of his hand. Watch out, though, a falling rock might hit you. Slide away if need to, then slide back.