Johan, you have the gold armor and L3 saber, right? If not, I recommend gettign them. L3 saber is in Lapin town's shop and the gold armor is in the mountains.
After beating level 7 or 8, if you go to the west side of Lapin in the OW (go aroudn the forest to the left), you'll come to a brick wall on the mountain. Super bombing this will take you to a side level with a very useful item. I'm giving you this tip, because you'll probably want that weapon.
And as Petoe said, there is a block puzzle. It's hard to memorize, so I drew it down on paper when I first played.


