Great job, and nice prototype!  You definitely went beyond the requirements for the project.  The mapping between physical tokens and music sequences worked well, and the interface seemed very intuitive.  It would be interesting to explore how use of the system developed with either multiple users or with a single expert user.  Additionally, some of the ideas that came up in class, like giving performers colored gloves, could be very cool.  When discussing your project, it would be worth considering how it is different from other tangible music tools, such as the puck-based sequencer that was described earlier in the semester.