I finished the puzzle #525 (7x7) in 29 minutes, 46 seconds in One Up Puzzle.

It was my first time playing, and I enjoyed it. I have a couple thoughts:

• I think they should have the undo button also undo the notes. I made a mistake on several notes in a row, and hitting undo only undid my guesses. I still had to figure out all the changes I made to notes.
• There should be a share option to copy to clipboard.

There was a misunderstanding. They were supposed to try hot yoga, not yoga flame.