Missing small details like these makes it fall into the uncanny valley. It looks like a typical puzzle on the surface but when you try to solve it all the mistakes stick out.
And that's fair; this whole thing could be one-shot with any of the leading models.
I'm curious, What kind of details are you thinking of? I'm not sure I really have much of a radar for LLM websites in the way I do for LLM pictures or music.
- Off-white or sepia toned backgrounds, similar subdued color palette for icons, grey ALL CAPS subheadings
- Serifed headings
- Various "Item: Quantity" lists (Puzzle types: 10, Puzzles solved: 1,951, etc.)
- Middle dot character for separator
One common tell it is lacking is the placement of colored dots or circles in the corners of panels or other UI elements, sometimes animated/pulsing.
To be clear it's not bad, it's a clean and friendly style. It just has that certain look, like a visual "it's not X it's Y".
It can definitely be prompted pretty successfully though, a bird spotting app was up her on HN recently with some really nice looking woodblock prints that were AI generated (I always feel disappointed/tricked when art turns out to be made by AI, I'm not sure why, it seems to pull the joy out of it for me)