To tastelessly copypaste off the Wikipedia article for kintsugi:
Kintsugi (金継ぎ, "golden joinery"), also known as kintsukuroi (金繕い, "golden repair"), is the Japanese art of repairing broken pottery by mending the areas of breakage with lacquer dusted or mixed with powdered gold, silver, or platinum [...] it treats breakage and repair as part of the history of an object, rather than something to disguise.
If you aren't familiar with kintsugi, I highly recommend looking up some repaired works. They can be quite beautiful.
Indeed, in this short-lived little experience, pottery is broken and you click and drag pieces to put it back together. You do this to a very nice background song that adds to the chill vibes. At the end, you have a repaired work with pretty golden streaks going through it, and a little quote/line to read. There is not much else to it - there are a few pieces you can put back together, and afterwards that's it.
Like with a lot of these microgames, I don't really mind it. It was a couple refreshing minutes out of my day, with an excellent song in the background and gave me something to think about and be distracted by. The bright background maybe made finding the broken white pieces tricky, and it's maybe a little straightforward when all the pieces fall in a tidy little pile for you. For the most part, though, it's a quick little moment that I appreciated.
I enjoyed it. Kintsugi is a good game.