+ get out of the brick room

On the bricks, there are three dad jokes that have to do with time. Each of these has a number with dashes:

5--

-3-

--2

String these numbers together for the keycode.

+ open the office door

On the back of the cards:
Earth (CHAIR), Virus (E), Mask (PI):

...or cherry pie

+ OPEN THE DESK

In the ghost trees, what you hear are animal sounds:
The crow calls 8 times
The duck quacks 2 times
The frog croaks 5 times

+ OPEN THE WORKSHOP

Use the red decoder spyglass to read the message on the door.

The "family" is the playing cards – Kings, Queens and Jacks. There is one card missing from this "family": The Queen Of Clubs.

+ LICENSE PLATES

A Lighthouse Keeper: C-SIDE
A Burglar: NE1HOME
A Baby Talker: AUIYQ
A School Teacher: LMNTRE
A Musician: PNO2NA
A Sommelier: MY YNRE
A Food Critic: I82MUCH
A Park Ranger: CNIK-VU
A Con Artist: 1UOVR
A Dentist: 2THDK
A Plastic Surgeon: 4FR YNG
A World Traveler: UROPN2R
A Librarian: BKYIT
A Philosopher: UNIR1
A Little Old Lady: LILOL8E

Once you place these, turn over each card in its place. There you'll find a state with an abbreviation. These abbreviations spell out passwords for some locks.

+ the false wall keypad

There is an alpaca above the keypad. The card with the alpaca on it has a grid corresponding to the license plates. When placed correctly, the filled-in plates' states spell out AL-PA-CA

+ my dear family

On the floor in the workshop, a note reads "My Dear Family – Paulette, Carter, Orville – Always" The cards with the people's faces on them should be put together. When turned over, those faces reveal numbers.

The numbers for Pualette, Carter, and Orville, in that order, open the door.

+ PINK ROSE BOX

Embark (M-BARK in the ghost trees)
Embed (M-BED in the Workshop)
Emit (E-MITT in the rocky pass)
Empty (M-TEA in the hallway)
These words have numbers on the pink rose card.

+ BENCH CHEST

Line up the dice so that BANANA is spelled by the numbers on the sides, as shown in the clue in the desk. What reads across the top of the dice is 1-6-6, which spells a word using the same key.

+ BASEMENT DOOR

On the back of the card with an upright bass (BASE) and a sprig of mint (MENT) is half a grid corresponding to the license plates. The other half of the grid is found inside the pink rose box.

When placed correctly, the filled-in plates' states spell ME-MO-RI-AL

+ OPENING THE VAULT

"Visitors" refers to the ABBA Album you found in the bench chest.
The Ballrom has a performance of the ABBA song "Dancing Queen"

The Electrical Room has a panel with A (36) and B (24) on it.

Enter the numbers for A-B-B-A to open the vault.

+ THE TIME DOOR

On the back of the card with an hourglass (TIME) and a door (DOOR) is a grid corresponding to the license plates. When placed correctly, the filled-in plates' states spell DE-CO-DE-GA-NY-ME-DE, or "Decode Ganymede".

Using the list found in the vault, there are two numbers in the line for Ganymede. One of them opens the door.

+ STOPPING THE TIME MACHINE - MANUAL OVERRIDE

This thing all things devours;
Birds, beasts, trees, flowers;
Gnaws Iron, bites steel;
Grinds hard stones to meal;
Slays king, ruins town;
And beats high mountain down.

"time"