I love this idea. I think it could be quite an interesting tool for teaching beginners. There are plenty of possible "power-ups" such as a wildcard note or "hit the prize with the sound". There's genuine satisfaction in getting to the edge of the "map" and seeing your note float off into space.
It's also a great take on the theme. The bee line-art is cute, the sound is smooth (if a trifle loud) and I love anything with hex tiles :)
Obviously, there are some UI issues... the drag bug isn't limited to mobile browsers, it appears to be across the board. There are some issues with tiles stacking on each other too, which led in one case to notes cycling rapidly back and forth with no way to interrupt 'em.
Overall, a great and creative submission, well done!