Heeding the warning about the comments being full of spoilers, I did not look at anything else about this game and got to the end in about 3 evenings! (97, but the comments clued me in and I went back for 98.) I thought the final puzzle was the perfect level of trickiness, then I read all the comments complaining about it, and THEN I realized an update to make the final puzzle easier had been uploaded as I was still playing the cached older version. Bit of a bummer, but I now have bragging rights that I solved the tougher version. 🤭 Absolutely amazing game!