I don't really have a lot to say about HEAVY DAY. It is just a pretty good opening theme.
Melody
Super memorable, especially the chorus. I really like the effect on the opening
Evolution
Fits the song very well. I enjoy it.
Emotion
Surprisingly, I actually feel a bit in the chorus, and a good bit in the ending section.
Bangerness
Pretty good. Especially the chorus ("Back to back!").
Characterization
-
Lyrics
Quite catchy. I like them.
B.O.F. Bonus
-
Bread 
