Shadows are small hidden creatures found across different memories in the game.
There are 9 shadows in total, and collecting them is optional but fun.
You can track your progress anytime in-game.
All Shadow Locations
Shadow 1
At the start, go to the right room.
Check the plant pot on the right and move the leaves.
Shadow 2
In the Bar Memory, go to the room with the Magician.
Open the bench seat on the right.
Shadow 3
Still in the Bar Memory, go to the stage room.
Move the bottom of the red curtain (right side).
Shadow 4
In the Garden Memory, move left to the frog area.
Tap the tree with red leaves and look up.
Shadow 5
After Garden Memory, enter the new left area.
Go to the room with the large door.
Move the red cushion on the chair (right side).
Shadow 6
In the Laboratory Memory (first room) with the black and white cat:
Use the microscope and set it to 100x magnification.
Shadow 7
Still in the Laboratory, go to the far left room (brown cat).
Open the window, then tap the red bushes outside.
Shadow 8
In the Mansion Memory, go to the right corner room.
Check the loose floorboard on the right side.
Shadow 9
In the Mansion Memory, go to the far right room with the crystal.
Look out the window, find the graveyard, and tap the center gravestone.
Final Note
Shadows are not required to finish the game, but collecting all 9 adds extra fun and completion progress.