Thanks so much for the review for our game! I also think of the circle drawing at first but my teammates think it's a bit tiring so i have to change it into scrolling the mouse wheel.
Oh, and about the mouse wheel, i develop and debug the game on my Macbook, so i usually swipe my trackpad with 2 fingers so it's easier, when i export the game and actually find a mouse to play, i also figured out that the audio is a bit not so smooth, sorry for the inconvenience.
About adding more songs in the future, Minny also did create a few original songs, but it didn't fit the game, so we decided to proceed with royalty-free song on the internet, just to share our idea to people in this jam.
Thanks for playing our game, once again!