Hey, thanks for playing!
We know it's a pretty difficult game, especially by the end.
For the first level, you actually only need to add lines to the top and right sides. We were hoping that by showing that two of the guidelines were already green when you start the first level with the organ in the corner, it would teach players that the edges also count as surrounding the organ, but it seems we didn't succeed in making that clear unfortunately. So that's something we'd need to be more thoughtful of to explain if this was a full game.
Sorry to hear it made the experience worse, though!