Thank you! Jsyk, there is an indicator of where the beats are visually, it's the bobbing motion of the ghosts.
As for the style of music, I will admit to being more interested in making music for characters and environments rather than for specific styles.
The speed the ghosts come at scales up as you speed up the song at a constant rate so it doesn't actually make it any more survivable. Faster songs just dramatically increase your scoring potential.
Thank you for playing, I'm glad you enjoyed it :)