All in all, I think this a very clever game, and a little bit funny. It does not give you much at all, but the hints are there. Some levels were really good, 2 and 5 (i think?) stood out. A couple that werent puzzles at all, and i think they would be much better to be the first level. The first level is maybe 7th hardest puzzle, although it is easier after you know the format of what is going on. I think some things like a blank itch page makes it more seem like low effort, rather than intentionally leaving it blank, and have the app do the talking. I honestly, like the others, thought the game was broken the first two times i tried to play, only reading your comment made me realise I didnt read EVERYTHING. Puzzle 9 was almost a bit too frustrating, but i found the right thing you were looking for.
But yeah, I had fun once I knew it was solvable. Not sure it really did much with the rock theme but hey ho