Just getting into the idea of using a :“band” other than Mellow Chords.
I like that with a band the rhythmic frame of the chord changes stands out more strongly.
I see there are very thin white barlines, but they are almost impossible to see against the background.
I would find it helpful if the color/contrast of the barlines could be darkened so that chord changes that lead or follow the bar boundary are more visually apparent.
There is often interesting rhythmic information in your puzzles, and playing my instrument along with them is something I find to be worthwhile for that aspect as well as the harmony.