I noticed that when the orb has bounced around for a while without breaking any blocks it'll start flashing. When it bounce off the wand again the flashing will stop, and a chime can be heard. So what is the flashing signify, and what happens when the flashing ball bounce off my paddle?
You are about to regenerate mana. This happens when your ball bounces around enough times (seven?) without hitting a brick. This lets you simply blast that last brick out of the way yourself.