rename addPhysicsWorld (has nothing to do with physics)

obj/Area.lua

@@ -55,9 +55,9 @@ function Area:addGameObject(game_object_type, x, y, opts)
     return game_object
 end
 
----Initializes HC physics as a world
+---Initializes HC collision manager as a world
 ---@param cell_size number|nil
-function Area:addPhysicsWorld(cell_size)
+function Area:addCollisionManager(cell_size)
     self.world = HC(cell_size or 100)
 end
 

rooms/Stage.lua

@@ -3,7 +3,7 @@ local Stage = Room:extend()
 
 function Stage:new()
     Stage.super.new(self)
-    self.area:addPhysicsWorld()
+    self.area:addCollisionManager()
     self.area:addGameObject('Player', gw/2, gh/2)
 end