Loop Line is an interesting sound toy! The wiggly line is something I'm curious about how you created, since it reacts so smoothly to the weight of the balls! I understood the change in tone had some correlation to the number balls placed on the line, and their position. I wasn't entirely certain what the bottom 'switch' does, where the loop is fully connected. I couldn't hear the difference in either mode when I used the bottom switch, and it would be nice if there was a little more clarity on what it did. I personally enjoyed 'dirty mode' and the crackly noises it made, but the regular mode's more traditional synth sounds still fit this experience quite well. 

Visually, this reminds me a lot of birds sitting on a power line! I'd have loved to have seen a more concrete visual theme for this cool little toy! Right now it feels quite abstract, and I think you should lean into that more if you plan on continuing the abstract route in the future! I'd have liked to have read a bit about your inspiration for this piece as well! 

One other thing to consider for the future might be how other shapes would interact with a line, in an abstract route. Balls roll around, which add a lot of randomness, so it might be interesting to have 'static' or barrier shapes, like squares, as a contrasting point.