The castle entrance is where you begin the game, it is also, coincidentally, where you end the game. There are two guards at the gate. Heading to the left leads you to the Shop Hall. Heading out the gates brings you to the Outside Entrance. There was a glitch for quite a long time where, if you walked to the far east side of the room, the game would not stop you and you would keep walking off the screen. This was eventually patched.