Gorgeous and satisfying game. I think the Youtube video that is unlocked when you get all the keys has been removed from Youtube though. Unless I'm missing something regarding the 2321 clue?

really wishing for the "reveal up to 3 keys" option from your newest game for this one.

where is it :0

well, this is not a 100 cat game for sure. However, It has the same difficulty that finding the last 1-2 keys is very hard, but it's even worse in this game. The image, while much more interesting when zoomed out, is much less interesting when zoomed in. So boredom is reached much quicker while searching for the last 10 or so keys. It badly needs some kind of hint option, or something......