I like that you had fun making this, but the mix sounds muddy and I cannot make out the lyrics. The vocalist's lyrics are drowned out in her own echoes.
Also, I couldn't find your song in the final collab. I don't fully know why they didn't include it.
UPDATE: I can sort of hear it now, but barely. For future reference, make sure the vocals are perfectly legible before you add delay + reverb (and even then keep clarity in mind), then duck the instruments behind the vocals.
2nd update: Actually, I think I was wrong: It is in the collab: Just credited as Dekaeo (an alt). My mistake.