Ussachevsky's Two sketches for a computer piece

I really liked this one because of the interesting little melodic themes. This one was also created using GROOVE, and has two distinct musical themes (hence the name "two sketches"). The first one has some sounds that seem to be imitating strings, some that seem to be imitating piano and some that might be imitating organ, I'm not really sure. It's trying to sound a little like instruments, but not too much like instruments. It has these long organ(?) sounds followed by some short abrupt violin sounds and the occasional piano chord. It's edgy and offputting, and I kind of like it a lot.

The second sketch is much more electronic sounding. It has some booming kind of sound in the bass, and then lots of little high pitched blips. The low booms sound a little like giant footsteps or something. This makes me again think of some sort of outerspace movie...