diff --git a/Makefile b/Makefile
index 9de9081..fb79b69 100644
--- a/Makefile
+++ b/Makefile
@@ -4,4 +4,5 @@ build:
 	go build -o dist/game.exe
 dep:
 	go mod tidy
-	
+doc:
+	godoc -http=:3000
\ No newline at end of file
diff --git a/src/konstructor/config.go b/src/konstructor/config.go
index 6c15920..642fc8c 100644
--- a/src/konstructor/config.go
+++ b/src/konstructor/config.go
@@ -2,31 +2,37 @@ package konstructor
 
 import "image/color"
 
+// Windows resolution set
 type ResolutionSet struct {
 	Width  int
 	Height int
 }
 
+// QVGA resolution set
 var QVGAResolutionSet = ResolutionSet{
 	Width:  320,
 	Height: 240,
 }
 
+// VGA resolution set
 var VGAResolutionSet = ResolutionSet{
 	Width:  640,
 	Height: 480,
 }
 
+// SVGA resolution set
 var SVGAResolutionSet = ResolutionSet{
 	Width:  800,
 	Height: 600,
 }
 
+// XGA resolution set
 var XGAResolutionSet = ResolutionSet{
 	Width:  1024,
 	Height: 768,
 }
 
+// List of resolution sets
 var ResolutionSets = []ResolutionSet{
 	QVGAResolutionSet,
 	VGAResolutionSet,
@@ -34,6 +40,7 @@ var ResolutionSets = []ResolutionSet{
 	XGAResolutionSet,
 }
 
+// Keyboard layout configuration
 type KeyMap struct {
 	Up      any
 	Down    any
@@ -45,17 +52,21 @@ type KeyMap struct {
 	Action3 any
 }
 
+// Screen configuration
 type ScreenConfig struct {
 	Width  int
 	Height int
 	Scale  int
 }
+
+// Header configuration
 type HeaderConfig struct {
 	BackgroundColor color.Color
 	Height          int
 	FontLayout      FontLayout
 }
 
+// Game configuration
 type Config struct {
 	Name   string
 	Screen *ScreenConfig
@@ -63,6 +74,7 @@ type Config struct {
 	KeyMap KeyMap
 }
 
+// Set screen resolution config to a resolution set
 func (c *Config) SetResolution(set ResolutionSet) {
 	c.Screen.Width = set.Width
 	c.Screen.Height = set.Height
diff --git a/src/konstructor/interface.domain.go b/src/konstructor/interface.domain.go
index 39e4a28..fb7d81c 100644
--- a/src/konstructor/interface.domain.go
+++ b/src/konstructor/interface.domain.go
@@ -1,5 +1,7 @@
 package konstructor
 
+// Base fields for Domain layer.
+// You need to include this of your game's domain struct
 type DomainBaseFields struct {
 	MenuMap         MenuMap
 	DialogMap       DialogMap
@@ -10,40 +12,66 @@ type DomainBaseFields struct {
 	NPCTypeMap      NPCTypeMap
 }
 
+// Domain interface.
+// You need to implement this interface in your game's domain struct
 type DomainInterface interface {
+	// Domain initialization. This variable will invoke only once when the game starts
 	Init()
 
+	// Return with the default KContext object
 	GetInitialKContext() *KContext
+	// Return with the default config object
 	GetInitialConfig() *Config
 
+	// Return with the menu map
 	GetMenuMap() MenuMap
+	// Return with a specific menu
 	GetMenu(name MenuMapKey) Menu
+	// Owerride a specific menu
 	SetMenu(name MenuMapKey, menu Menu)
 
+	// Return with the dialog map
 	GetDialogMap() DialogMap
+	// Return with a specific dialog
 	GetDialog(name DialogMapKey) Dialog
+	// Override a specific menu
 	SetDialog(name DialogMapKey, menu Dialog)
 
+	// Get levels
 	GetLevels() []Level
+	// Get a specific level
 	GetLevel(index int) Level
 
+	// Get players for multiplayer game
 	GetPlayers() []Player
+	// Get a specific player for multiplayer game
 	GetPlayer(index int) Player
+	// Get the player for simple player game
 	GetDefaultPlayer() Player
 
+	// Return with the platform type map
 	GetPlatformTypeMap() PlatformTypeMap
+	// Return with a specific platform type
 	GetPlatformType(name PlatformTypeMapKey) PlatformType
 
+	// Return with the item type map
 	GetItemTypeMap() ItemTypeMap
+	// Return with a specific item type
 	GetItemType(name ItemTypeMapKey) ItemType
 
+	// Return with the NPC type map
 	GetNPCTypeMap() NPCTypeMap
+	// Return with a specific NPC type
 	GetNPCType(name NPCTypeMapKey) NPCType
 
+	// Add item to inventory
 	AddToInventory(item *Item) bool
+	// Remove item from inventory
 	RemoveFromInventory(item *Item) bool
+	// Use inventory item
 	UseInventoryItem(item *Item) bool
 
+	// Process game flow by Domain layer
 	Process(DomainProcessArgs)
 }
 
diff --git a/src/konstructor/interface.engine.go b/src/konstructor/interface.engine.go
index e326183..34e89c5 100644
--- a/src/konstructor/interface.engine.go
+++ b/src/konstructor/interface.engine.go
@@ -1,11 +1,13 @@
 package konstructor
 
+// Initial arguments of an engine
 type EngineArgs struct {
 	Domain   DomainInterface
 	KContext *KContext
 	Config   *Config
 }
 
+// Engine wrapper interface. You need to implement to this for your EntityWrapper, which can run your game engine
 type EngineWrapperInterface interface {
 	Init(options EngineArgs)
 	Run()
diff --git a/src/konstructor/kcontext.go b/src/konstructor/kcontext.go
index 1ae323d..158c0f8 100644
--- a/src/konstructor/kcontext.go
+++ b/src/konstructor/kcontext.go
@@ -1,5 +1,6 @@
 package konstructor
 
+// Framework context (state)
 type KContext struct {
 	ScreenType        ScreenType
 	ActiveMenu        MenuMapKey
@@ -10,6 +11,7 @@ type KContext struct {
 	LiveCount         int
 }
 
+// Check the current screen type
 func (c *KContext) ScreenTypeIs(name ScreenType) bool {
 	return c.ScreenType == name
 }
diff --git a/src/konstructor/konstructor.go b/src/konstructor/konstructor.go
index 531bc5f..16a9332 100644
--- a/src/konstructor/konstructor.go
+++ b/src/konstructor/konstructor.go
@@ -7,6 +7,7 @@ type Konstructor struct {
 	EngineWrapper EngineWrapperInterface
 }
 
+// Framework initialization
 func (k Konstructor) Init() {
 	k.Domain.Init()
 	k.EngineWrapper.Init(EngineArgs{
diff --git a/src/konstructor/layout.font.go b/src/konstructor/layout.font.go
index c919f67..077c125 100644
--- a/src/konstructor/layout.font.go
+++ b/src/konstructor/layout.font.go
@@ -8,8 +8,10 @@ import (
 	"golang.org/x/image/font/opentype"
 )
 
+// Font name type for function input validation
 type FontName string
 
+// Font preset
 type FontLayout struct {
 	Path           string
 	DPI            float64
@@ -19,6 +21,7 @@ type FontLayout struct {
 	cachedFontFace font.Face
 }
 
+// Get font face from the preset
 func (fl *FontLayout) GetFontFace(scale int) font.Face {
 	if fl.cachedFontFace != nil {
 		return fl.cachedFontFace
@@ -34,6 +37,7 @@ func (fl *FontLayout) GetFontFace(scale int) font.Face {
 	return font_face
 }
 
+// Helper, which return the path of font
 func GetFontPath(name FontName) string {
 	return "assets/fonts/" + string(name) + ".ttf"
 }
diff --git a/src/konstructor/layout.render.go b/src/konstructor/layout.render.go
index c73a1e9..85cfb1b 100644
--- a/src/konstructor/layout.render.go
+++ b/src/konstructor/layout.render.go
@@ -7,6 +7,7 @@ import (
 	"log"
 )
 
+// Element render options
 type Render struct {
 	Image       string
 	Width       int
@@ -15,6 +16,7 @@ type Render struct {
 	cachedImage image.Image
 }
 
+// Get image object from image path
 func (ro *Render) GetImage() image.Image {
 	if ro.cachedImage != nil {
 		return ro.cachedImage
diff --git a/src/konstructor/object.go b/src/konstructor/object.go
index 28250e9..62d595c 100644
--- a/src/konstructor/object.go
+++ b/src/konstructor/object.go
@@ -1,5 +1,6 @@
 package konstructor
 
+// Object type type for function input validation
 type ObjectType string
 
 const (
@@ -9,6 +10,7 @@ const (
 	PlayerObjectType   ObjectType = "player"
 )
 
+// Map of object type's directories
 type ObjectDirectoryMap map[ObjectType]string
 
 var ObjectDirectories = ObjectDirectoryMap{
@@ -18,6 +20,7 @@ var ObjectDirectories = ObjectDirectoryMap{
 	PlayerObjectType:   "players",
 }
 
+// Return with the path of a specific object type asset directory
 func GetObjectDirectory(name ObjectType) string {
 	return "assets/images/" + ObjectDirectories[name] + "/"
 }
diff --git a/src/konstructor/object.item.go b/src/konstructor/object.item.go
index a0046a1..7a19d6b 100644
--- a/src/konstructor/object.item.go
+++ b/src/konstructor/object.item.go
@@ -4,17 +4,20 @@ type ItemTypeMapKey string
 
 type ItemTypeMap map[ItemTypeMapKey]ItemType
 
+// Type of item
 type ItemType struct {
 	ID     string
 	Render Render
 }
 
+// Playground usable item, which can be put in the Inventory
 type Item struct {
 	ID       string
 	Type     ItemType
 	Position Position
 }
 
+// Helper, which return with the path of a specific item type
 func GetItemTypeImagePath(name ItemTypeMapKey) string {
 	return GetObjectDirectory(ItemObjectType) + string(name) + ".png"
 }
diff --git a/src/konstructor/object.npc.go b/src/konstructor/object.npc.go
index 1e655b3..e051b29 100644
--- a/src/konstructor/object.npc.go
+++ b/src/konstructor/object.npc.go
@@ -15,6 +15,7 @@ type NPC struct {
 	Position Position
 }
 
+// Helper, which return with the path of a specific NPC type
 func GetNPCTypeImagePath(name NPCTypeMapKey) string {
 	return GetObjectDirectory(NPCObjectType) + string(name) + ".png"
 }
diff --git a/src/konstructor/object.platform.go b/src/konstructor/object.platform.go
index 63b4df7..2ddd11d 100644
--- a/src/konstructor/object.platform.go
+++ b/src/konstructor/object.platform.go
@@ -15,6 +15,7 @@ type Platform struct {
 	Position Position
 }
 
+// Helper, which return with the path of a specific platform type
 func GetPlatformTypeImagePath(name PlatformTypeMapKey) string {
 	return GetObjectDirectory(PlatformObjectType) + string(name) + ".png"
 }
diff --git a/src/konstructor/object.player.go b/src/konstructor/object.player.go
index b978985..3cf8af3 100644
--- a/src/konstructor/object.player.go
+++ b/src/konstructor/object.player.go
@@ -8,15 +8,18 @@ type InventoryItem struct {
 	Active bool
 }
 
+// Player inventory
 type Inventory struct {
 	Items []InventoryItem
 }
 
+// Player type
 type PlayerType struct {
 	ID     PlayerTypeID
 	Render Render
 }
 
+// Playable character
 type Player struct {
 	ID        string
 	Type      PlayerType
@@ -24,6 +27,7 @@ type Player struct {
 	Inventory Inventory
 }
 
+// Helper, which return with the path of a specific player type
 func GetPlayerTypeImagePath(name PlayerTypeID) string {
 	return GetObjectDirectory(PlayerObjectType) + string(name) + ".png"
 }
diff --git a/src/konstructor/screen.dialog.go b/src/konstructor/screen.dialog.go
index 9b71f5d..2d9da90 100644
--- a/src/konstructor/screen.dialog.go
+++ b/src/konstructor/screen.dialog.go
@@ -6,23 +6,27 @@ type DialogMapKey string
 
 type DialogMap map[DialogMapKey]Dialog
 
+// Layout of dialog
 type DialogLayout struct {
 	Render     Render
 	ChoiceFont FontLayout
 }
 
+// Choicable answer in a dialog (by player)
 type DialogChoice struct {
 	ID      string
 	Label   string
 	Handler func()
 }
 
+// Dialog between player and NPC
 type Dialog struct {
 	CurrentSelected int
 	Layout          DialogLayout
 	Choices         []DialogChoice
 }
 
+// Return with color of choice
 func (dialog *Dialog) GetChoiceColor(i int) color.Color {
 	if dialog.CurrentSelected == i {
 		return dialog.Layout.ChoiceFont.SelectedColor
diff --git a/src/konstructor/screen.menu.go b/src/konstructor/screen.menu.go
index 229d6d2..2c146d1 100644
--- a/src/konstructor/screen.menu.go
+++ b/src/konstructor/screen.menu.go
@@ -4,24 +4,29 @@ import "image/color"
 
 type MenuMapKey string
 
+// Map of menus
 type MenuMap map[MenuMapKey]Menu
 
+// Layout of menu
 type MenuLayout struct {
 	MenuItemFont FontLayout
 }
 
+// Menu item
 type MenuItem struct {
 	ID      string
 	Label   string
 	Handler func()
 }
 
+// Game menu
 type Menu struct {
 	CurrentSelected int
 	Layout          MenuLayout
 	MenuItems       []MenuItem
 }
 
+// Return with the color of menu item
 func (menu *Menu) GetMenuItemColor(i int) color.Color {
 	if menu.CurrentSelected == i {
 		return menu.Layout.MenuItemFont.SelectedColor
diff --git a/src/konstructor/screen.playground.go b/src/konstructor/screen.playground.go
index ba4bd15..318755b 100644
--- a/src/konstructor/screen.playground.go
+++ b/src/konstructor/screen.playground.go
@@ -1,13 +1,16 @@
 package konstructor
 
+// ID of playground for method input validation
 type PlaygroundID string
 
+// Position configuration
 type Position struct {
 	X int
 	Y int
 	Z int
 }
 
+// Displayable section of a level
 type Playground struct {
 	ID        PlaygroundID
 	Render    Render
@@ -16,12 +19,14 @@ type Playground struct {
 	Items     []Item
 }
 
+// Game level
 type Level struct {
 	ID          string
 	Name        string
 	Playgrounds []Playground
 }
 
+// Return with the path of a specific playground background
 func GetPlaygroundImagePath(name PlaygroundID) string {
 	return "assets/images/playgrounds/" + string(name) + ".png"
 }
diff --git a/src/konstructor/screen.type.go b/src/konstructor/screen.type.go
index 50eddbd..b56b0d6 100644
--- a/src/konstructor/screen.type.go
+++ b/src/konstructor/screen.type.go
@@ -1,5 +1,6 @@
 package konstructor
 
+// Type of screen type for method input validation
 type ScreenType string
 
 const (