Thank you so much for the detailed feedback! Vision cones are a great idea and something I'd definitely want to implement in a possible post-jam version.
You make some good points about the level design. I think one of my problems is that most of my level design experience comes from making custom puzzles for already tough puzzle games and making PuzzleScript games, where in both cases I can expect the target audience to be relatively familiar with Sokoban mechanics and patterns. Even then, I often tend to make the difficulty curve a bit too steep for most people's liking. So feedback like this is very valuable to me for trying to learn how to design a more accessible puzzle game.