Options - Restart Level
In Goal and Practice mode, many of the drill levels increment within a level. For example, with Keyboard Note Names, more white keys appear on the screen, or, with Keyboard Melody, the melody length gets longer. If a drill becomes too difficult, one option is to start the current level over. This will reset only the current level of the current objective see MusicGoals Terms to its starting configuration.
You may also use Practice Settings - Set Practice Level or press F9 to jump to any level for practice and review. Then when you are ready, use the Practice/Custom/Goal button to cycle back to Goal mode.