Or at least the start of one. This is similar to the first work I did here, but this seems to be headed in a more solid direction. There are 4 parts so far.
Was it a mistake to make the 3rd repetition a mirrored form of the original? In the 4th, the bass line is played by the higher voice while the bass uses a faster part derived from itself.
Is this an improvement from my earlier attempt?
Edit: I updated and took echurchills advice by developing the initial upper voice melody a little more... though I also stuck the mirrored ostinato into the upper voice near the end as well (where it then goes into a sequence of 16ths that might sound a little contrived).
Another Edit: new version where the ostinato remains mostly literal. I'm happy up to the point where the inverted ostinato begins (immediately following the modulation to Em). The upper voice there is an inverted form of the original opening voice, but it sounds too distracting as it is now.
The mp3, if you don't like the midi.
Latest (version 6)