Pretty nice, good quality
I like the body of sound in general. A couple of pointers maybe:
I kinda was wanting a stronger bass line, to punch it out a bit more. Also, for the main melody, a faster attack or release at some of the half steps may make it more dramatic. Right now it seems to be caught between two genres cuz the melody is too ethereal.
You might even consider adding an extra higher pitched accompaniment somewhere in the middle to give it more texture.
Overall its really nice and i would probably use this in something like a futuristic techno game or some ominous chase scene.