Thanks for the feedback. Sorry you found it so difficult. I've managed to get over 50s for each level and over a minute for a few of them so it's not impossible but I do think it starts off too hard and I'll be adding easier levels at the beginning.
In the title screen there's a button that mutes the music and there's a bug where clicking anywhere on the title screen will mute it, clicking again will bring it back. That's probably what happened.