First, the Positives:
I can recognize all the locations and characters on screen from Cuphead. They are least drawn well enough to be recognizable.
Also that chiptune music is pretty awesome. Sounds like Tim Follins.
Now The Negatives:
While the artwork does represent cuphead, it needs work on some fundamentals. Golden Age cartoon art is actually quite well constructed with it's inky rubber hose people and bouncy vibrancy with characters always bouncing to some kind of beat, despite some simplistic aspects. Here, every thing seems to be a little stiff. I have I hard time at this kind of stuff too, adding a realistic sense of weight and proportion to objects. There's other little details missing too.
The animation is kind of lack luster, and there's not enough action. Cuphead is the only character I see in this animation. When I think of cuphead, I usually think of him zipping about, somersaulting over projectiles and and zapping enemies with the rapid snapping of his fingers.
And finally the autotune. Every true and professional musician I know advises against autotune, because it is not a good substitute for vocal due to a lackluster singing ability. It can only cover it up so much. You should practice your own vocal talent with rehearsals to make sure you hit each note, pitch, tone, and key. I also noticed the lyrics don't quite fit the music because there's either not enough words to hit each note in a melodic measure, or the words are not spaced out enough to fill the measure.
I know there are some software out there that can help.
I used to use a software called "Singing Coach." It's 19.99 on amazon. I suggest it because it is a little like a toned down version of Kareoke Revolution, and it's cheap readily available. There's also "Singing Method" which is more expensive, but might be better.
Back in the day, I used to play Kareoke Revolution on the Ps2, that helped me sing a little better(I used sing really terribly, now, I'm not that good, but definitely better than as a child). A more current game called "Rock Band" has a vocal mode where you can sing a song and you are scored based on performance.