Wow, what a dazzling reverb (what plugin is this?), the introduction is magically ethereal. For 6 hours of work this is incredible; what a beautiful vocal performance (you've got a great vibrato!) accompanied with a gorgeous harmony. I can give you some feedback on the mixing, but you might already know what you're doing and just be time constrained. I apologize if none of this is helpful.
-start advice that you may already know-
You used quite a generous amount of reverb, and the decay is set pretty high too. This sounds stunning during the sparser sections of the track, but it can become a double edged sword the denser the arrangement becomes. If you have any notes that can create dissonance with the next chord, the reverb tail will carry over and clash with it. There can also be a certain amount of muddiness in the lower mid range if too many sounds accumulate and go through the reverb. There are a number of solutions to this problem, use multiple of them to get the best results:
1. Use a highpass filter on the reverb to prevent low-mid buildup.
2. If you have notes in the lower mid range that clash with the next few notes or chords, it could be better to swap to more open voicings (push the more dissonant notes to the higher parts of the arrangement).
3. Put your reverb on a separate track, set it to 100% mix and add a compressor with sidechain after the reverb. Send the instruments audio to the compressor's sidechain signal. Adjust the threshold so that the compressor reduces the reverb volume when the mix gets denser.
-end advice that you may already know-
I think you captured the fleeting feeling of the dreamworld as a person wakes up from slumber. This is a very satisfying final track, it captures a hopeful sense of purpose gained from a long journey. Congratulations on your first English track, I think it turned out very well. I'm gladyou decided to join with so little time left, this is a great submission.