this song could use some stereo work:
- the drums could use some stereo imaging (give each "drum" its own panning).
- the instruments themselves sound fairly mono. I haven't figured out how to make a mono sound wider, but by doing that, you could get a ZUN-style sausage waveform.
you might also make the drums a little quieter and everything else a little louder, but that might happened anyway if you do some stereo stuff.