This is a great, really polished-feeling game, and a pleasure to play. Two things I would have love to have seen are:
1. Some sort of scoring mechanism. I wanted some way to be able to compare how well I did against prior performances or other people.
2. A faster difficulty curve (or a difficulty curve, period, I couldn't tell). I was playing for eight minutes and still near the top of the buster meter. While being able to do it forever until physical limitations take over is authentic for a fillibuster, it would have been nice if the bar decreased faster over time.