The pizzicato instruments definitely give the feeling of walking on pins and needles so to say, and while the chords are rather simplistic the feeling of suspense is there slightly. On the other hand, the turned up high notes, while they help keep the prickling tension around, breaks up the balance of the audio. As a suggestion keep the high notes standing out, but toned down by a bit as to keep the volume range within a little more even threshold.
Overall I can listen to it loop over and over so the nitpicks I pointed out are just my opinions, and it's a pretty decent composition.