I could not for the life of me figure out the right timing for the heartbeat. I'm not sure if it's bugged and the visual did not match the input detection logic, or I'm maybe just bad. No matter how I tried to align my beat with the moving bar, results were always inconsistent and I basically couldn't focus on anything else going on.
This game otherwise look and sound absolutely incredible! I love the idea and the interpretation of the theme. Would definitely try a 1.1 ver of that.
Keep it up!