Overall, we enjoyed the songs instrumental (reminded us of older visual tracks) but our main thing is that we suggest you improve the tuning of Miku (not that it's bad) since some points do sound a bit off.
Just realised I didn't give any response - but thank you for dropping by and commenting! I noticed Miku's tuning and I do agree that at some point it does sound weird. I'm glad that all of you enjoyed the song!