This game is very fun. The art is great (I love that there's some variety in the people). The sound is good, and the music is super catchy.
I love the gameplay idea of "infecting people with dance". The game was super polished, I found no bugs whatsoever. The only problem i found with the game was that it felt too easy. You should've had maybe 3 different difficulties each with faster arrows. Also, for rhythm games, always try to make the arrows follow the notes from the song, it makes it feel like you're actually playing the song.
Overall, a super fun game, and the fact that you made everything yourselves really shows how much effort you put into this. Good luck in the game jam!