The puzzles are in the game's order (+/- because you can choose different paths), giving you tips (if you want them), before the solution.
I won't explain every single move in this game, only the puzzles (or something people generally struggle with - if you think there should be something added, let me know!) Have fun!
PS. Hover over the black elements to see inside the spoilers.

Tip: On the right side of the panel you can see a highlighted 30, that's the number you need to achieve.
Solution: 20+20-10 (2nd, 4th, and 5th lever).

Examine the cube and look for one side that has all the symbols in one place.
Enter the symbols in the order that's shown on that side. The order is:
The First one:

The Second one:

The Third one:

The Fourth one:

The Fifth one:

Tip: You need the static to go away, to reveal the room.
Solution: You need these settings:

This puzzle is to a certain degree random. Tips won't help here, so i will be listing only the solutions to the game clues.
IF you find a clue that's not listed below - let me know. Due to the nature of the puzzle it's hard to roll every single clue. I will update the guide when i see any new ones!
a)
"A chess player is on the X floor (or any variation with him like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put his bag on the correct (said) place.
This is how the bag looks like:

b)
"A globetrotter is on the X floor (or any variation with him like under X, upper / bottom half (5,4 / 2,1), even / odd)"-> you need to put his bag on the correct (said) place.
This is how the bag looks like:

c)
"A hiker is on the X floor (or any variation with him like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put his bag on the correct (said) place.
This is how the bag looks like:

d)
"The heaviest bag is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

e)
"The owner of a convenient bag is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

f)
"A businessman is in a room that is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

g)
"A musician is in a room that is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

h)
"The owner of the smallest bag is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

i)
"A sportsman is in a room on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

k)
"The owner of a very worn backpack is on the X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd)" -> you need to put the bag on the correct (said) place.
This is how the bag looks like:

"A person travelling without any luggage is on X floor (or any variation with it like under X, upper / bottom half (5,4 / 2,1), even / odd"-> This means that you don't put ANY bag there. This place will be empty.

Example of completion (WON'T BE THE SAME FOR YOU well, probably):
The example of a list:

The solution to that exact list:

Tip: In the 2 rooms you have available, you can find these symbols on the walls. Input them in the given order.
Solution: The correct order is:
First one:

Second one:

Third one:

Fourth one:

Fifth one:

1st tip: Look around the room for the clues, they are close to you.
2nd tip: Fill in the ? gaps accordingly (what comes after 3 fish -> 5 fish? What's between a sun and a moon or what's the process described here? What's the missing state of a tree?). These are your answers.
Solution: 7 fish, an orange tree, and a state where both sun and moon are visible.

1st tip: You need to find a place where it belongs.
2nd tip: There is a tiger's head painted on a wall.
3rd tip: After placing the plushie on the mattress, read carefully what Amy says.
Solution: Place the plushie on the mattress in the kid's room. Leave the room and return to it to receive a garbage container.

You need 3 masks in total.
1st tip: What would be the appropriate masks in their situation? One mannequin is holding the second one in his hands. The third mannequin stands above them with a knife.
2nd tip: you can examine the smiling mask.
Solution: Death mask goes to the purple mannequin, frowning mask goes to the green mannequin, and the sinister mask goes to the red mannequin.

1st tip: Try looking for a staff member, it's their door after all.
2nd tip: When you find the name tag in the changing room, try inspecting it a bit more.
Since it's rng there isn't a real solution, however this is where you can find it: There is a code to the door on the name tag's back.

1st tip: Try looking around the place for a code. It might be hidden in the plain sight.
2nd tip: There is a letter in the mailbox outside of the room with the code - read into it carefully.
Solution: you need to input 6->14->22 into the safe. Enter the 6 clockwise then 14 counterclockwise and 22 clockwise again.

1st tip: try connecting the corresponding colors with each other, without going through any broken elements.
2nd tip: the cables can change directions across screens.
Since the puzzle is RNG there is no real solution to it. I can give an example though.

Example of a solution:
Left side:red to 5th cable, green to 6th cable.
Right side:red to 1st cable, green to 3rd cable.

There are 3 Golden Chips in total that you need to find.

1st Golden Chip(Roulette):
1st tip: Since the game is rigged by the casino, you need to increase your luck.
2nd tip: There are exactly 3 lucky items you need to obtain to win. A four-leaf clover, A horseshoe, and a jade coin.
3rd tip: ( locations of lucky item ):
You can find four-leaf clover by helping someone in need.
You can find horseshoe on a wall.
You can find jade coin by looking in places where coins gets stuck frequently.
Solution:
You can find horseshoe here: Use a screwdriver on it.
You can find jade coin here: Use a screwdriver on the machine.
You can find A four-leaf clover here: Give the wiskey (bought from the Casino manager) to the sad guest.

What to do with luck items: Afterwards go to the roulette (buy chips from the Casino Manager)and win with the luck items in your inventory.

2nd Golden Chip(Slot Machine:
1st tip: Talk to the Dr. Shulzer, he might have some important information.
2nd tip: He mentioned that he tampered with one of the slot machines, find it.
Solution: Find the tamepered machine (will be one of the four slot machines that are empty - Red / Blue / Green / Yellow)
For the star puzzle, you want to hold the star that's at the bottom once. A second star should align with the bottom one. Afterwards, hold the other star that's not aligned with anything twice. If done corretly all stars should match up.

3rd Golden Chip(Angry Guest):
1st tip: Maybe Joshua might help?
2nd tip: You need to finish Joshua's quest to kick the Angry Quest from the casino. You need to find recordings that the casino is suspicious, most NPCs are happy, but not all of them.
Solution: There are exactly 3 guests you need to record. What they mention exactly is RNG, but they can mention things like debt, having to win etc. Just look for the odd ones. When you get the Loaded Dice give them to the Angry Guest, to make him leave the area. (after you return to the area, his gold chip will be on the ground)

There are no real tips for that so i will just give the quick solution(maybe the fastest? Not sure):
Solution: click everything that's not in the middle once, like in the picture:

(click everything besides the tiles marked with X)

Solution: Well not much i can say here, you need to have all lines synchronised (there can't be any dead ends on the cylidner etc).

1st tip: You need to find 2 paintings to fill the gaps.
2nd tip: First painting is in the room with paintings (at the bottom) and the second one is in the coffee room. (locked behind the key)
3nd tip: You need to line up the paintings so they match together.
Solution

Tip: You need to align the yellow arrows on the book with the empty spaces in the book spot.
Solution: Bottom arrow facing up, middle arrow facing left (into the book's main cover - front of the book), top arrow facing right (back of the book).

I would say this puzzle is the weirdest one out of them all, because it has so many possible interpretations.
1st tip: Book titles are quite important here (you can find hidden meanings in them).
2nd tip: You need to use the numbers from the books (the hidden meanings, so pentagram = 5 etc) and correlate it with something.
3rd tip: the numbers correlate to the number of gems on the crown. You need to see the order out of it and put it together.
The solution is: looking from the top: red, green, purple, yellow, blue.