Unlock Dragonfly mini-game in 'Main' menu: During the story select 'Attack' instead of 'Evade' enemy between each of the chapters and complete the Dragonfly missions and the Dragonfly mini-game will be unlocked at the 'Main' menu.
If your Chi or Focus is at Zero. Press start and go to the gem section. Take of all your gems and replace them with Mind or Spirit gems. Exit the start menu and you will see that your Chi or Focus bar will not be empty any more. You won't get more Chi or Focus if you do it more than one time when you ha some thing left.