This is fun! The music is good, which is great for this kind of game, and I love the graphical style. The palette limitation is pretty strict, but I think you've made the most out of it. It just feels really cohesive.
I have to agree with the previous commenters in that the difficulty might be a bit much, especially if you're not super used to rhythm games. Four lanes with four possible moves each is a lot to throw at the player all at once, especially since you also have to time the button presses correctly. It's easier to manage on a gamepad than on the keyboard, but even then it's a lot. Reducing the number of lanes or making it easier to move left and right would help a lot, maybe with something like a progression mechanic added (where you start with one lane and lanes are added/removed depending on your combo multiplier.) But either way, you have an extremely solid base for a game here.
Also, breakdance is a fun way to use the theme. Very much unexpected, but fits well.