Overgrowth/guide

Roller Skates
Take the east path. Go north and interact with the roller blades.

Alice
Take the south path. Go south-west and enter the treehouse. Go up the stairs and enter the top-right room. Go down and read the book on the left of the bottom-middle bookcase.

Seedling
Take the west path. Go north-east to a sandy clearing surrounded by water. Interact with the large flower.

Shovel
(Note: This effect is not equippable or usable in-game. Getting this effect will also end the demo).

Take the east path. Go south-east and enter the toy box. Go right and enter the house. Enter the doorway on the left. Enter the purple door. Go up to where the graveyard and skeletons are. Go to the top-left corner where a stone path lined with blue flowers is. Proceed along the path then follow it to a pair of graves. Take the shovel.

Hole Event
Take the south path. Go south-west and step over the hole near the treehouse. Go right along the path and watch the ensuing dialogue. Go right a little bit and the NPC will charge you, waking you up.

Dollhouse Event
Take the east path. Go south-east and enter the toy box. Go right and enter the house. Enter the doorway on the right. Go right and enter the doorway beside the purple door. Walk to the edge of the balcony and you'll briefly converse with the same NPC from the Hole Event. You'll then be pushed off the balcony, causing you to wake up.

Skeleton Rave
Take the east path. Go south-east and enter the toy box. Go right and enter the house. Enter the doorway on the left. Enter the purple door. Go up to where the graveyard and skeletons are. Go to the middle of the graveyard where several skeletons are dancing around some speakers. Interact with the skeleton in the middle for a fullscreen event.