Short Answer 
The process involves identifying a significant cat on a boat, analyzing scattered post-its for clues, and ultimately decoding the message to spell the word “BOAT,” which corresponds to the numerical code 1537.
Identify the Elements
Begin by observing the scene where a cat is present on a boat. It’s crucial to note the significance of this cat, as it is the only one that remains and hasn’t been taken or vanished. Close examination of your surroundings will provide essential clues.
Analyze the Clues
Next, pay attention to the post-its scattered around the room. These notes will likely contain letters or symbols that can lead to forming a specific word. Collectively, these clues point toward spelling out the word BOAT, which is vital for deciphering the code.
Decode the Message
After identifying the word BOAT, correlate it with the corresponding numerical code. Through this, you will derive the code 1537. This final step ensures that you can use the gathered information effectively to progress.