diff --git a/gamecore/modules/assets/animator.lua b/gamecore/modules/assets/animator.lua
index 716263c..b64c293 100644
--- a/gamecore/modules/assets/animator.lua
+++ b/gamecore/modules/assets/animator.lua
@@ -24,6 +24,9 @@
 
 local Animator = Object:extend()
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Animator:new(sprite)
   self.sprite     = sprite
   self.frame      = 1
@@ -40,6 +43,9 @@ function Animator:setCustomSpeed(customSpeed)
   self.customSpeed = customSpeed or 0
 end
 
+-- UPDATE FUNCTIONS
+-- Update the animation of the animator
+
 function Animator:update(dt)
   if (self.currentAnimation == "") then
     print("warning: no current animation data")
@@ -61,25 +67,8 @@ function Animator:update(dt)
   end
 end
 
-function Animator:getAnimationDuration(animation)
-  return (self.animationData.endAt - self.animationData.startAt) / self.animationData.speed
-end
-
-function Animator:getFrame()
-  return self.frame
-end
-
-function Animator:animationExist(name)
-  return (self.sprite.data.animations[self.currentAnimation] ~= nil)
-end
-
-function Animator:draw(x, y, r, sx, sy, ox, oy, kx, ky)
-  self.sprite:drawFrame(self.frame, x, y, r, sx, sy, ox, oy, kx, ky)
-end
-
-function Animator:drawMask(x, y, r, sx, sy, ox, oy, kx, ky)
-  self.sprite:drawFrameMask(self.frame, x, y, r, sx, sy, ox, oy, kx, ky)
-end
+-- ANIMATION HANDLING FUNCTIONS
+-- Change the animation of the animator
 
 function Animator:changeAnimation(name, restart)
   -- Force restart if animation name is different
@@ -102,4 +91,30 @@ function Animator:changeToDefaultAnimation(restart)
   self:changeAnimation(self.sprite.data.metadata.defaultAnim, restart)
 end
 
+-- INFO FUNCTIONS
+-- get information with these functions
+
+function Animator:getAnimationDuration(animation)
+  return (self.animationData.endAt - self.animationData.startAt) / self.animationData.speed
+end
+
+function Animator:getFrame()
+  return self.frame
+end
+
+function Animator:animationExist(name)
+  return (self.sprite.data.animations[self.currentAnimation] ~= nil)
+end
+
+-- DRAW FUNCTIONS
+-- Draw animations using these functions
+
+function Animator:draw(x, y, r, sx, sy, ox, oy, kx, ky)
+  self.sprite:drawFrame(self.frame, x, y, r, sx, sy, ox, oy, kx, ky)
+end
+
+function Animator:drawMask(x, y, r, sx, sy, ox, oy, kx, ky)
+  self.sprite:drawFrameMask(self.frame, x, y, r, sx, sy, ox, oy, kx, ky)
+end
+
 return Animator
diff --git a/gamecore/modules/assets/autotile.lua b/gamecore/modules/assets/autotile.lua
index 0cfaf6d..b441ab1 100644
--- a/gamecore/modules/assets/autotile.lua
+++ b/gamecore/modules/assets/autotile.lua
@@ -27,6 +27,9 @@ local cwd  = (...):gsub('%.autotile$', '') .. "."
 local Tileset = require(cwd .. "tileset")
 local Autotile = Object:extend()
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Autotile:new(filepath)
   self.tileset = Tileset(filepath)
 
@@ -36,6 +39,9 @@ function Autotile:new(filepath)
   self.tilesize = self.metadata.width
 end
 
+-- DRAW FUNCTIONS
+-- Draw tileset using these functions
+
 function Autotile:drawtile(i, j, x, y, r, sx, sy, ox, oy, kx, ky)
   local i = i or 1
   local j = j or 1
diff --git a/gamecore/modules/assets/background.lua b/gamecore/modules/assets/background.lua
index 862050b..7a0ac56 100644
--- a/gamecore/modules/assets/background.lua
+++ b/gamecore/modules/assets/background.lua
@@ -24,6 +24,9 @@
 
 local Background = Object:extend()
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Background:new(filepath)
   self.image    = love.graphics.newImage(filepath)
   self.batch    = love.graphics.newSpriteBatch(self.image , 1000 )
diff --git a/gamecore/modules/assets/fonts.lua b/gamecore/modules/assets/fonts.lua
index f2bc7c9..c527144 100644
--- a/gamecore/modules/assets/fonts.lua
+++ b/gamecore/modules/assets/fonts.lua
@@ -25,6 +25,7 @@
 
 local Font = Object:extend()
 
+-- INIT FUNCTIONS
 -- Initilizing and configuring option
 
 function Font:new(filename, size)
@@ -70,7 +71,8 @@ function Font:setLineHeight(height)
   self.font:setLineHeight(height)
 end
 
--- get information functions
+-- INFO FUNCTIONS
+-- get information with these functions
 
 function Font:getHeight()
   local font = self.font
@@ -91,7 +93,8 @@ function Font:getColor()
   return self.color
 end
 
--- print functions
+-- DRAW FUNCTIONS
+-- print text using theses functions
 
 function Font:draw(text, x, y, limit, align, r, sx, sy, ox, oy, kx, ky)
   -- draw text with color and effect applied
@@ -124,6 +127,7 @@ function Font:printf(text, x, y, limit, align, r, sx, sy, ox, oy, kx, ky)
 end
 
 -- FILTER SYSTEM
+-- With these filter, you can apply custom effects to the fonts
 
 function Font:applyFilter(text, x, y, limit, align, r, sx, sy, ox, oy, kx, ky)
   if self.filter == "shadow" then
diff --git a/gamecore/modules/assets/imagefonts.lua b/gamecore/modules/assets/imagefonts.lua
index 3cf2c1b..86f318b 100644
--- a/gamecore/modules/assets/imagefonts.lua
+++ b/gamecore/modules/assets/imagefonts.lua
@@ -1,7 +1,35 @@
+-- assets/fonts :: the imagefonts object, which are basically a bitmap version
+-- of the font object.
+
+--[[
+  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('%.imagefonts$', '') .. "."
+
 local Font        = require(cwd.. "fonts")
 local ImageFont   = Font:extend()
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function ImageFont:new(filename, extraspacing)
   local data    = require(filename)
   local extraspacing = extraspacing or data.extraspacing or 1
diff --git a/gamecore/modules/assets/init.lua b/gamecore/modules/assets/init.lua
index 5fe379f..04a7c02 100644
--- a/gamecore/modules/assets/init.lua
+++ b/gamecore/modules/assets/init.lua
@@ -36,43 +36,25 @@ local Tileset     = require(cwd ..  "tileset")
 local Autotile    = require(cwd ..  "autotile")
 local Background  = require(cwd ..  "background")
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
 
 function Assets:new()
-  self.sprites    = {}
-  self.sfx        = {}
-  self.fonts      = {}
-  self.music      = nil
-  self:clearBackgrounds()
-  self:clearFonts()
-  self:clearAutotile()
-  self:clearTileset()
-
-  self.images = {}
+  self:clear()
 
   self.isActive = true
 end
 
-function Assets:init()
-  self.sprites    = {}
-  self.sfx        = {}
-  self.fonts      = {}
-  self.music      = nil
-  self.backgrounds= {}
-  self:clearFonts()
-
-  self.images = {}
-end
-
 function Assets:clear()
   -- TODO: destroy individually each texture/image when assets are cleared
-  self.sprites    = {}
-  self.sfx        = {}
-  self.fonts      = {}
-  self.music      = nil
-  self.backgrounds= {}
+  self:clearSprites()
+  self:clearSFX()
+  self:clearFonts()
+  self:resetMusic()
+  self:clearBackgrounds()
   self:clearFonts()
 
-  self.images = {}
+  self:clearImages()
 end
 
 function Assets:update(dt)
@@ -81,7 +63,8 @@ function Assets:update(dt)
   end
 end
 
--- SFX et Musique
+-- SFX & MUSICS
+-- Handle sound effects and musics
 
 function Assets:addSFX(name, filepath)
   self:newSFX(name, filepath)
@@ -96,14 +79,6 @@ function Assets:clearSFX()
   self.sfx = {}
 end
 
-function Assets:setMusic(filename)
-  if filename ~= nil then
-    love.audio.stop( )
-    self.music = love.audio.newSource(filename, "stream" )
-    self.music:setVolume(core.options.data.audio.music / 100)
-  end
-end
-
 function Assets:playSFX(filename)
   if not (self.sfx[filename] == nil) then
     self.sfx[filename]:stop()
@@ -112,9 +87,11 @@ function Assets:playSFX(filename)
   end
 end
 
-function Assets:playMusic()
-  if not (self.music == nil) then
-    love.audio.play(self.music)
+function Assets:setMusic(filename)
+  if filename ~= nil then
+    love.audio.stop( )
+    self.music = love.audio.newSource(filename, "stream" )
+    self.music:setVolume(core.options.data.audio.music / 100)
   end
 end
 
@@ -122,7 +99,18 @@ function Assets:silence()
   love.audio.stop()
 end
 
--- Background --
+function Assets:resetMusic()
+  self.music = nil
+end
+
+function Assets:playMusic()
+  if not (self.music == nil) then
+    love.audio.play(self.music)
+  end
+end
+
+-- IMAGES FUNCTIONS
+-- Create directly texture items
 
 function Assets:addImage(name, filename)
   self.images[name] = Texture(filename)
@@ -132,39 +120,42 @@ function Assets:drawImage(name, x, y, r, sx, sy, ox, oy, kx, ky)
   self.images[name]:draw(x, y, r, sx, sy, ox, oy, kx, ky)
 end
 
--- Images --
+function Assets:clearImages()
+  self.images = {}
+end
+
+-- BACKGROUNDS FUNCTIONS
+-- Automatic tiling texture
+
+function Assets:addBackground(name, filepath)
+  -- TODO: rework entirely background to work at any size
+  self.backgrounds[name] = Background(filepath)
+end
 
 function Assets:clearBackgrounds()
   self.backgrounds = {}
 end
 
-function Assets:addBackground(name, filepath)
-  self.backgrounds[name] = Background(filepath)
-end
-
--- SPRITES --
-
+-- SPRITES FUNCTIONS
+-- Animated tileset
 
 function Assets:addSprite(name, filepath)
   self.sprites[name] = Sprite(filepath)
 end
 
-function Assets:clearSprites()
-  self.sprites = {}
-end
-
 function Assets:animationsUpdate(dt)
   for i,v in pairs(self.sprites) do
     v:update(dt)
   end
 end
 
--- FONTS --
-
-function Assets:clearFonts()
-  self.fonts = {}
+function Assets:clearSprites()
+  self.sprites = {}
 end
 
+-- FONTS FUNCTIONS
+-- Handles fonts and imagesfonts
+
 function Assets:addFont(key, filename, size)
   local font = Font(filename, size)
   self.fonts[key] = font
@@ -179,7 +170,12 @@ function Assets:getFont(filename)
   return self.fonts[filename]
 end
 
--- Tileset
+function Assets:clearFonts()
+  self.fonts = {}
+end
+
+-- TILESET FUNCTIONS
+-- Automatically create quads for a texture
 
 function Assets:addTileset(name, filepath)
   self.tileset[name] = Tileset(filepath)
@@ -189,7 +185,8 @@ function Assets:clearTileset()
   self.tileset = {}
 end
 
--- Autotile
+-- AUTOTILE FUNCTIONS
+-- Automatically draw tiles
 
 function Assets:addAutotile(name, tilesize)
   self.autotile[name] = Autotile(name, tilesize)
diff --git a/gamecore/modules/assets/sprites.lua b/gamecore/modules/assets/sprites.lua
index 0749b63..1282363 100644
--- a/gamecore/modules/assets/sprites.lua
+++ b/gamecore/modules/assets/sprites.lua
@@ -29,6 +29,9 @@ local cwd  = (...):gsub('%.sprites$', '') .. "."
 local Animator  = require(cwd .. "animator")
 local Tileset   = require(cwd .. "tileset")
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Sprite:new(filepath)
   self.tileset  = Tileset(filepath)
   self.data     = require(filepath)
@@ -60,10 +63,16 @@ function Sprite:changeAnimation(name, restart)
   self.animator:changeAnimation(name, restart)
 end
 
+-- INFO FUNCTIONS
+-- get information with these functions
+
 function Sprite:animationExist(name)
   return self.animator:animationExist(name)
 end
 
+-- DRAW FUNCTIONS
+-- Draw sprites using these functions
+
 function Sprite:drawAnimation(x, y, r, sx, sy, ox, oy, kx, ky)
   self.animator:draw(x, y, r, sx, sy, ox, oy, kx, ky)
 end
diff --git a/gamecore/modules/assets/texture.lua b/gamecore/modules/assets/texture.lua
index 63313d9..30901f3 100644
--- a/gamecore/modules/assets/texture.lua
+++ b/gamecore/modules/assets/texture.lua
@@ -32,6 +32,9 @@ local function getMask(x, y, r, g, b, a)
     return 1, 1, 1, a
 end
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Texture:new(filename)
   self.imageData = love.image.newImageData(filename)
 
@@ -42,10 +45,16 @@ function Texture:new(filename)
   self.mask  = love.graphics.newImage( maskData )
 end
 
+-- INFO FUNCTIONS
+-- get information with these functions
+
 function Texture:getDimensions()
   return self.image:getDimensions()
 end
 
+-- DRAW FUNCTIONS
+-- Draw texture using these functions
+
 function Texture:draw(x, y, r, sx, sy, ox, oy, kx, ky)
   love.graphics.draw(self.image, x, y, r, sx, sy, ox, oy, kx, ky)
 end
diff --git a/gamecore/modules/assets/tileset.lua b/gamecore/modules/assets/tileset.lua
index 40ae249..a2f5dff 100644
--- a/gamecore/modules/assets/tileset.lua
+++ b/gamecore/modules/assets/tileset.lua
@@ -31,6 +31,9 @@ local cwd  = (...):gsub('%.tileset$', '') .. "."
 
 local Texture = require(cwd .. "texture")
 
+-- INIT FUNCTIONS
+-- Initilizing and configuring option
+
 function Tileset:new(filepath)
   self.texture  = Texture(filepath .. ".png")
 
@@ -66,6 +69,9 @@ function Tileset:createQuads()
 
 end
 
+-- INFO FUNCTIONS
+-- get information with these functions
+
 function Tileset:getTileID_Grid(x, y)
   local n = (y - 1) * self.gridWidth + x
 
@@ -80,6 +86,9 @@ function Tileset:getTile(n)
   return self.quads[n]
 end
 
+-- DRAW FUNCTIONS
+-- Draw tileset using these functions
+
 function Tileset:drawTile_Grid(i, j, x, y, r, sx, sy, ox, oy, kx, ky)
   local tileID = self:getTileID_Grid(i, j)
   self.texture:drawQuad(self.quads[tileID], x, y, r, sx, sy, ox, oy, kx, ky)
@@ -98,5 +107,4 @@ function Tileset:drawTileMask(id, x, y, r, sx, sy, ox, oy, kx, ky)
   self.texture:drawMaskQuad(self.quads[id], x, y, r, sx, sy, ox, oy, kx, ky)
 end
 
-
 return Tileset