The player ( HENCE THE NAME) is the player's avatar. The player is able to customize his or her self and control the avatar. The player can perform all actions which exist in the game. These include walking, running, jumping, climbing, swimming, attacking, taming, etc.
The player is able to walk, run, and jump by simply pressing the WASD keys, and the spacebar. The player can activate attack mode by pressing Tab. A Third-Person view can be enabled by pressing O, although moving around will reset to First-Person. Same goes for swimming and climbing, simply press the WASD keys to move. The player can also perform many other non-moving actions, which you can read about in the Controls Page.