How do you unlock w7 and w8

Answer from: Gold Flower123
Same here, i can't figure it out

Answer from: GirlieGirl Punk
Okay I just figured it out on level 1 in the first castle, I couldn't find the 2nd star so I was looking all over and unlocked W7(I think). So what I did was go through the door on the left and it puts you in a room with green blocks and a big coin thingy in the middle. Follow the green blocks to the right and there is an opening where they go into the wall walk through there. It will take you to a secret world. I hope I explained it okay....Good Luck! I haven't been to star world yet.....

Answer from: Gamerfreak3000
Their is no world 7 and 8 its mushroom world and star world.

Answer from: Tails
World 7 and World 8? I think you mean World Mushroom and World Flower. To unlock World Mushroom, go to World 1-Tower. At the checkpoint, there will be a door. Go in it and you'll be in a room with a Coin Roulette Block, Snake Blocks and a Warp Pipe that creates Bone Goombas. Go in a passage with a Warp Pipe. Enter it and you'll find a secret exit that unlocks a green Toad House and a Warp Cannon level. Complete it and you've unlocked World Mushroom. To unlock World Flower, go to World 3-Tower as Mini Mario. Play as normal until you see two small blocks blocking the rest of the level. They'll go left and right after a while. Follow the block going to the right. You'll find a tiny Warp Pipe (which is why you need to be Mini Mario). Enter it and complete the secret exit to find a Warp Cannon level. Complete it to unlock World Flower. There is, however, another way to unlock World Flower. Go to World Mushroom-Ghost House. Near the goal, there are two holes in the ceiling. Wall Jump up into the one on the right. Press the ? Switch to make the third Star Coin appear in the ceiling hole on the left and make a door appear to the right of you leading to the secret exit, but it's guarded by a Boo. Just go past him. Afterwards, you have to complete World Mushroom-B before going to the Warp Cannon to World Flower. Note: Warp Cannon levels whave Mario running to the right nonstop until it's complete or if you lose a life.