

Go up a level to collect the third puzzle piece. Place a Clockwork Bomb on it, and then run through the door that opens. Look for a pressure pad that's on top of the desk. Go upstairs, and then head into the next room. Then look under the stairs for a keyhole to the second puzzle piece. Then break the Ruin Barrier to find the first puzzle piece. Start off by going downstairs, and defeat the Menacing Ruin and Slithering Ruin that are down here. There are four puzzle pieces around the house that you need to get. There's another puzzle in here (like the one from Chapter 2 and 3). The dollhouse will then close behind you. Go back to the invisible platforms, and use them to cross the gap. Jump on them and then look behind you to find Pig Snout #3/8 in a secret compartment. Walk to the edge of the platform and use Shrink Sense to find two invisible platforms. Use the slide that's up here, and at the bottom, ignore the mushroom for now. Pull the lever to continue through the area. Then jump to the final platform with a lever. Then jump from platform to the steam vent, and then into another steam vent. You may see some Drifting Ruin as you cross. Place a Clockwork Bomb on the pad that's on this platform, and then jump across the gap to the platform that raised up. Jump into the first steam vent, and then onto the platform, missing the spiked swing. In the next area, you'll see a lot of steam vents, and some spiked swings. Break the gingerbread-man barrier up here. Drop back down into the house, and use the mushroom to go up a few floors. There's a lever up here, and pulling it will rearrange the inside of the house. Once in here, go up the stairs and use the steam vent to turn around and get back into the house. Then go through the section that opened when you defeated the enemies.

On the other side of this wall is Bottle #3/13. Look inside, and to the right will be a gingerbread-man wall. Then walk back to the house you came from. Once you've defeated her, look around for some cake pieces. This will remove her arms and clothes, exposing her heart. This enemy can be a bit tricky to kill, but what you want to do is shoot the nails on her back. Defeat them for a cutscene, and afterwards, you'll be introduced to a new enemy the Dollgirl. There's a few Drifting Ruin and a Menacing Ruin in the next area. There's another gingerbread-man barrier (on the floor), so break it and drop through to keep going.

Pull the lever to move the keyhole on the floor. Break it with the hobby horse to find a lever behind it. There's a room here with a gingerbread-man wall. Drop down through the trap door, and then go through the keyhole at the bottom. Go inside and pull the lever here to open a trap door. Jump from the steam vent to the greenhouse that's on the right.
