Hey, that is a promising project!
I've practiced boxing a lot, and the 1st thing I tried was "jab/cross" but I see the character "tired". I think I understand why you did that, you probably want the game to be a "funny casual" game instead of a combo, fast paced versus fighting game. Being able to throw lightning fast punches would make a different game.
However, that's an interesting question to debate wether not you want to make a fun party game or something more complex to master, because the controls are pretty hard to get used to. Not everyone can grab the pad and have fun in 5 min.
I personnally love the "realistic" aspect of it, but with the visuals, it looks like you want to go for the party game.
I'm curious which path you will choose.
Good luck!