In boss fights, clicking a track with the mouse now reliably moves you to it. Clicking outside the tracks moves you one track over, and clicking the boss moves you to its track.
In your first boss fight, the game now pauses at your first counter and at the finishing blow, showing which button to press and waiting for you. If you miss it on another track, it tells you how to get the next one. Use "Show tips again" to see it once more.