I had a problem where some of the text would appear partly out of view, towards the left side of the screen. Other than that, I agree with asupNico's comment, especially the part where managing time is tough. I would've loved to see the music note exchange mechanic you planned on adding.
You did a good job with your first rhythm game! I also like the little animation at the start.
Since there are only a few days left, I am rating and giving feedback to games with few ratings. I would appreciate it if you rated my game too. No need to leave a comment, unless you feel like it.
Thanks for the experience =]