Hi!
I made a 24-day Advent Calendar puzzle for my girlfriend. Every day she opens a door on a website I built for her (there are small puzzles to open each door, but nothing too extreme).

This post is about the main meta-puzzle that runs across all 24 days.
It’s wrapped inside a story that slowly unfolds over Advent, and solving everything leads to a final reveal on Day 24.

Since this is my first puzzle design ever, I’d love feedback from puzzle people:

• Is this solvable?
• How difficult does it feel?
• How many hints did you need?

Below are all the hints she gets they’re spread out across the days.
Without any hints it might be very hard, but with all of them, it should be very doable.

Puzzle Fragments

I won’t include the image here, but the puzzle consists of 24 colored number fragments.
Each day reveals one fragment.

Hints (hidden behind spoiler blocks)

These are given on specific days of the Advent Calendar.
Revealed gradually, they make the puzzle much easier.

Day 6

!The fragments belong together. Their design is intentional. Colors matter.!<

Day 9

!Fragments of the same color must be arranged from light → dark.!<

Day 12

!Numbers map to letters using:
00 = space, 01 = a … 26 = z.!<

Day 15

!Each set of 3 fragments forms one long number.
One number must be divided by the other.
The result is always between 0 and 1.
Only the digits after the comma matter.!<

Additional Math Hint (given later)

!A normal calculator may not give enough precision.
You will need many decimal places.
The message ends when you reach 9999 a terminator that ensures no letters follow after that point.!<

Day 21

!A Roman emperor is connected to the final decoding step.!<

Day 24

!The final output is a long hex string.
It corresponds to a specific room in the Library of Babel.
When all sentences are decoded, you will know the wall, shelf, volume, and page number to search.!<

If you try to solve it…

Let me know:

• How many hints you used
• If any steps felt unfair or unclear
• How you approached assembling the fragments
• Whether the difficulty felt appropriate

This puzzle is a gift for someone very special,
so I'd love to make sure the experience is solvable and enjoyable.

Thanks, and have fun puzzling!

https://preview.redd.it/cz7znr7gzr5g1.png?width=1233&format=png&auto=webp&s=2ce7701fa7ba3c4730465efb8e379faa14e7bd98