Dreamy
It starts with a dream like feel to it. You awaken in a test chamber and quickly discover you must pass some tests to make it out of the lab alive. You pick up a strange looking gun. You aim at the wall and fire, a portal appears, you try to fire another one but notice the same color. Soon an exit appears, testing begins now...
The synth has a high sounding yet kazoo like feeling to it as well. It gives a feel that it could be a long day before you can finally leave and escape. The lower pitched areas of the synth playing sound kind of like 8-bit sounds actually, nice. The chorus gives a feel as if this is your final hope against GLaDOS as you search for the answers and the way out. The drums are awesome.
Overall, this is a great piece of work.