At the top left is the player window. It displays your character's health, power, and concentration. These three colored bars will change in real-time whenever you become hurt or heal, and whenever you consume or replenish your mental resources. You'll refer to this information frequently to judge how healthy or distressed your character is, because it's never a good idea to let your character die. Beside your character's info will be the same information about your enemy, if you have selected one. These are discussed in more detail in the Beginner Guides on Understanding Your Character and Understanding Your Enemy .