I strongly recommend solving the puzzles yourself, but if you want to see the solutions, check the video below. The coordinates with the timestamps are for the starting rooms where you can access the secret areas.
I've also added another video with a statue I have missed in the first one.

• 00:00 - [16,06]
  
• 01:32 - [23,08]
  
• 02:02 - [26,10]
  
• 03:00 - [10,09]
  
• 03:48 - [06,09]
  
• 06:55 - [16,14]
  
• 08:13 - [09,18]
  
• 09:13 - [16,20]
  
• 11:21 - [26,26]
  
• 12:17 - [09,26]
  
• 13:50 - [06,29]
  
• 14:19 - [13,28]
  
• 15:19 - [16,27]
  
• 16:27 - [28,30]
  
• 18:00 - [00,01]

https://www.youtube.com/watch?v=46tz7bj88p0
https://www.youtube.com/watch?v=kcdttB5cu3I

I also created a webpage with the full map, where you can check which coordinates belong to which rooms. Link to the page. [ooo-map-viewer.pages.dev]

There's one more statue in room 06,04, which is only reachable by basically cheating as far as I know. We will need to edit the save file with a hex editor (HxD for example), and then launch the game.
The save file is located at %localappdata%\Ooo (or C:\Users\username\AppData\Local\Ooo). Open it with the hex editor, and you will see bunch hexadecimal numbers. The 8th and 9th bytes in the first row are the coordinates for the last warp point you visited, which is your loading point when you launch the game.
For example, in the image below, you can see 0D 19 in the 8th and 9th bytes (at offset 07 and 08).
0D (hex) = 13 (decimal) and 19 (hex) = 25 (decimal), so my loading point is 13,25. You can use a decimal to hexadecimal converter and change these numbers into coordinates for any other warp point on the map, and you will spawn there, even if you didn't visit the room before.
Now, if you change these bytes into coordinates that doesn't have a warp point, you will spawn in 06,04 instead. It is the failsafe room.
Make sure to not change any other values, because it might corrupt your save file.