Stop enemies from running out of the map when near player

[cowsintuxedos]

One of the multiple goblins spawned will run out of the map if the player comes near, but the player cannot follow, as they cannot go through walls. Implement a way to stop the goblins from moving outside the boundaries when running away from the player.

200 pts?

[steve-fields]

F17 OK (150pts)

[steve-fields]

W18 OK (150 pts)