Really good! I love the dancing animation, and the core gameplay is fun as well. I do think it would be a bit better if taking steps in beat was incentivized, or even forced. That way you could more easily link the blue squares landing on the beat imo. That would also allow for different time signatures in songs leading to more interesting gameplay! You could have levels that force you to move in different subdivisions, like eighths or in threes or something, and paired with time signatures, you can have really interesting levels! You could even do more interesting patterns where you have to take steps only on certain beats, so for example if you are doing eighths (in 4/4 time) you could do a walk sequence like:
step x step x step x x
(x's are pauses)
I rambled on a bit but that's only because the base is so cool, it got my mind racing :D Congrats on the entry!