I'm not sure what's happening with those videogame stabs, and this is quite out of the norm for your usual production -- caught me off guard, in a good way when things came together!
Your vocals are delivered well. My only complaint is slight low-mid overhang in your reverb. The release is good. I would apply a multiband compressor, take down the 200-500 Hz range somewhat, bring up 13 khz to 18 khz, a little bit more rasp. Can also try applying light tape saturation.
You really have done a great job with the vocals here. Best yet imo. Very expressive. Using the full potential of the vocals in the sound space. At times the reverb does present problems with muddy mix or certain frequencies building up in the sound-space, but this is outweighed by far in your judicious pacing. I could listen to that outro for a week straight.
Phrasing wise, this piece is great. There are some instances where videogame instrumentation distracts me like 1:50 or so before our first chorus, later through it, BUT this is mostly because they're more sibilant than the vocals, which are subtle. Lo-pass filter fun maybe? You've used them to great effect in crafting a soundspace, which I appreciate.
Also, extra points for French language because I grew up listening to Alizee and I don't think that love will ever leave me, haha. I'm a sucker for vocals that are both French and female, aha. That I can occasionally understand a few phrases as I listen is telling -- and looking at those lyrics and English -- quite profound.
Like ChronoNomad, I think you did a great job keeping the rhythmic center of this piece together with your synths. I was waiting for a bombastic finale with some old fashioned percussion though. It's not even an issue though. Loved this piece to bits. Wish I could smash a download button!