The previous version simply stored what note was playing at each frame, and updated the audio channels accordingly. Because notes did not land exactly on the boundaries of 1/60th of a second intervals, the timing for everything was slightly off. This version, I implemented a proper tracker, which runs on its own timer eight times per beat, providing perfect precision for 1/32 notes, and the notes are stored by length instead of once every frame, reducing the size of the data. Now, the downside to this is it is no longer perfectly synchronized with the video, and since I am using Wabbitemu, I can't tell what is my fault and what is the audio delay present in Wabbitemu. Also, I can now go back to 30Hz progressive frames, but I'll save that for tomorrow.

Would it be possible to add the diagonal lines back in? I think it looks better that way.

I've added sound. Go ahead and try it in Wabbitemu or a real 83+/84+ SE, but be warned that it is horribly out of tune. There is also stuttering in the audio, but I can't tell if it is Wabbitemu or my code.

I was thinking that after you draw the nearest rectangle, that is the clipping rectangle for the next one, and you keep on shrinking it.

Then, as another differentiator, there could be two shapes - rounded like you currently have, and boxy sprites.

Just speculating there. Another simple game you could try writing is a 3D, as in 6DOF, maze.

O.o I wish I had that many pieces.

Now that I think about it, 3D snake would be too easy.