Hi!
Very clever game, I love that take on the theme, and overall it's very polished and nicely done.
Here are some of my thoughts:
- One of the rule mentions that the shortest path will be chosen. However, in some levels (for instance Up A Notch or Rule Number Three), both paths are the same length, and it doesn't seem like there's a priority system as some levels will prioritize the colored path, other will use the main red path. Nothing serious as you only have to play to find out how the level behaves, but for a puzzle game, that's a crucial info that is unclear which can be annoying. Maybe a path preview system before playing could be interesting? You may want to put the emphasis on the trial and error system, in such a case, a preview would not make sense, but I hope you get my point.
- I'd have expected the game to be a bit less punitive as it's a puzzle game and it's pretty cozy. However, after placing a tile, you cannot remove it or change its position, which prevents the player from trying things by moving the tiles and then press play to try out their solution. I believe this can quickly become very hard for people who have trouble with planning their level in their head only. Also, when playing and realizing that the solution is wrong, everything is lost, so you kinda have to memorize what you've tried not to do it again. It can be okay to include some memorization in the game, but here I feel like it would have been way more fun to play with a more flexible approach, focusing more on level design than having to do everything perfectly in one take.
- The artstyle is simple, but very effective and beautiful. However, it can quickly become repetitive, as well as the notes always being the same. I wish that some of the notes were bass notes, to add a bit more depth to the game audio (typically the first note from each bar could be a bass, it would be very cool imho). It's definitely okay for a jam game, but if I were to play the game for a few hours, I would expect it to have more visual/audio variations.
- Special mention for Up A Notch which is the best level by far in my opinion: it has this puzzle game moment where you think "okay it looks easy", then you try, and you look at the notes in the bars doing a A-B-B-A pattern and you're like "okay what?". Overall the game is not very hard (which makes sense for a puzzle game made for a jam), but that level was a very nice ending!
Hope you don't mind me being critical, I believe it's more constructive this way, but don't get my comment wrong, overall I seriously loved playing the game and that's definitely a game I'd play an extended version of!
Congratulations!