So after playing this daily, there is one thing on my wishlist: Could the menu screen display the score of the last game played? (last score and high score could go together perhaps). There is not time to see your score when it's Game Over, and I'm always left wondering how close I came to my high every time.
Adding this small but important feature would also give you an opportunity to rename the binaries to 1-Bit Pac Man and Zen 1-Bit Pac Man :)