Absolutely love this concept. The visuals and audio were also on point. With the dialogue, you managed to keep it simple while still conveying the struggle, and inner turmoil of the little boxing heart along with a bubbling of hope underneath. Well done! The different coloured text depicting the conversation was clever and added a simplicity that works so well with this game. I also thought combining story, character progression with the rhythm mini games was very original and enjoyable.
I'm not sure if this is because I am terrible at rhythm games (I am) but I felt that the controls weren't responsive sometimes? Again, that may just be me.
One note - I'm on a Linux machine, but managed to get the game to run with Wine.