Nice work, love the interpretation of the theme. Cute pixel characters and nice chill music.
Felt like the character was a bit too weighty which made avoiding already happy pixels a bit annoying. There were also times where I'd finish a dance, and then immediately get put into another dance with the same pixel.
The angry pixels felt like they were a bit too passive, to the point where I left the game running while writing this comment and they still haven't managed to make me sad. Simply making them dash more often would make things a lot more interesting (Though you'd have to make the character more able to dodge to compensate)