I also like this, but the original page is too rudimentary, and I found a new Simon Tatham's Puzzles site that works better. For example, the pattern puzzle game, I like it very much

I've been addicted to Simon Tatham Puzzle Collection recently, it's very fun. For example pegs puzzle, I have not yet found a solution

Great, I played it, the game is very good, thanks to the author's efforts. I also recommend another online game here, a collection of puzzle games developed using react and wasm. Based on the original game, a lot of optimizations have been made to support playing on mobile phones, support success reminders, and more languages and a more convenient UI. For example, this pegs game is really difficult.