Others have already noted that this sits pretty heavily in the high-mids and upper range so I won't focus on that. There are some really nice choice of voicings and patch work in this. Guitar does a good job of really providing a driving pulse to this piece, with those lead melodies in particular having just the right amount of balls to them to really sell them. Orchestration was really well done - nice layering of each string section, all with just enough motion to keep it interesting and engaging.
Kudos on the vocals - I'm always impressed with what people can come up with in a 48 hour period, and I can't imagine writing lyrics and then having to perform them, all within that period. Good job, this was interesting to listen to and pretty unique!