I really liked the music, do you mind telling how you did it?
Overall, the game is cool.. I think it match the theme of the jam ;)

Congratulations on your entry for this gamejam ^^'

A checkpoint system would be indeed very helpful to play this game. Also the platform placements are extremely difficult at times. I liked the game though the simplistic graphics were easy on the eye and I kept playing for a while (even though I quit after frustration).

The graphics, animation and music all fit the game well. 

Nice work!

It's a interesting unique take on the theme.The punching feels super satisfying,and the movement is really tight and fast.The music fits nicely alongside the gameplay.

Sometimes the platform and enemy placement is overly difficult(Which could be the intention but I don't know) but other than that the game feels like a puzzle rythme game in which every level is it's own puzzle,that you have to master.