diff --git a/gamecore/modules/world/actors/actor2D.lua b/gamecore/modules/world/actors/actor2D.lua
index 2c8cb4f..1e9d6dc 100644
--- a/gamecore/modules/world/actors/actor2D.lua
+++ b/gamecore/modules/world/actors/actor2D.lua
@@ -1,5 +1,32 @@
+-- actor2D.lua :: the implementation of a 2D actor. It contain every element
+-- needed to create your own 2D actors.
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
 local Actor2D = Object:extend()
 
+-- INIT FUNCTIONS
+-- Initialise the actor and its base functions
+
 function Actor2D:new(world, type, x, y, w, h)
   self.type   = type or ""
 
@@ -23,26 +50,38 @@ function Actor2D:initPhysics(x, y, w, h)
   self.h      = h or 0
 end
 
-function Actor2D:initKeys()
-  self.keys = core.input.fakekeys
-end
-
 function Actor2D:register()
   self.world:registerActor(self)
 end
 
+-- INPUT FUNCTIONS
+-- get input from the world object
+
+function Actor2D:initKeys()
+  self.keys = core.input.fakekeys
+end
+
 function Actor2D:getInput(keys)
   self.keys = keys or core.input.fakekeys
 end
 
+-- UPDATE FUNCTIONS
+-- Theses functions are activated every steps
+
 function Actor2D:update(dt)
   -- here will be update actions
 end
 
+-- MOVEMENT FUNCTIONS
+-- Basic functions from the movement.
+
 function Actor2D:move(newx, newy)
   self.world:moveActor(self, newx, newy)
 end
 
+-- DRAW FUNCTIONS
+-- Draw the actors.
+
 function Actor2D:draw()
   -- here will be update actions
 end
diff --git a/gamecore/modules/world/baseworld.lua b/gamecore/modules/world/baseworld.lua
index 389b77b..c0f3936 100644
--- a/gamecore/modules/world/baseworld.lua
+++ b/gamecore/modules/world/baseworld.lua
@@ -1,3 +1,27 @@
+-- baseworld.lua :: the base world object, that contain just a fast implementation
+-- of a 2D world. It doesn't support collision and stuff.
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
 local cwd   = (...):gsub('%.baseworld$', '') .. "."
 
 local BaseWorld = Object:extend()