Surprisingly enjoyable considering it is a ludum dare game. The mechanic sets it apart from many of the other games an i like that. The first impression of the music was that it was very good, but it got old very fast because it seems to loop too quickly. If you want inspiration on what can be done with audio in a game like yours, look up "jelly car" (the first one) https://youtu.be/9THE-yzmCB4?t=11 it had no music, but because all the sounds were made by a dude going "boing boing" it was instantly hilarious with almost no effort, and made the theme united with the art (jelly) and the silly physics (also jelly).
The gameplay in your game is hard (as others said, very qwop), and I think it could work, but I am too impatient. I couldn't even get one meter before I got bored (but that is me, i am too impatient, especially when rating ludum games). A distance counter would have doubled my playtime probably... putting detailed art assets constantly would have quadrupled it though.That way you get to see story/art when you even just move a tiny bit. this also opens the door to telling "implied story" through the visuals. Since I didn't get very far, I don't know about if there is a story so I won't say anything more about it. Overall I liked this ludum dare game.