diff --git a/konstructor/engine/engine.go b/konstructor/engine/engine.go
index 4163453..258836c 100644
--- a/konstructor/engine/engine.go
+++ b/konstructor/engine/engine.go
@@ -20,32 +20,32 @@ func (e *Engine) Layout(outsideWidth, outsideHeight int) (int, int) {
 
 func (e *Engine) Update(screen *ebiten.Image) error {
 	e.WatchKeyPress()
-	if e.KContext.ScreenTypeIs("menu") {
+	if e.KContext.ScreenTypeIs(entity.MenuScreenType) {
 		e.MenuUpdate()
 	}
-	if e.KContext.ScreenTypeIs("dialog") {
+	if e.KContext.ScreenTypeIs(entity.DialogScreenType) {
 		e.DialogUpdate()
 	}
-	if e.KContext.ScreenTypeIs("playground") {
+	if e.KContext.ScreenTypeIs(entity.PlaygroundScreenType) {
 		e.PlaygroundUpdate()
 	}
-	if e.KContext.ScreenTypeIs("inventory") {
+	if e.KContext.ScreenTypeIs(entity.InventoryScreenType) {
 		e.InventoryUpdate()
 	}
 	return nil
 }
 
 func (e *Engine) Draw(screen *ebiten.Image) {
-	if e.KContext.ScreenTypeIs("menu") {
+	if e.KContext.ScreenTypeIs(entity.MenuScreenType) {
 		e.MenuDraw(screen)
 	}
-	if e.KContext.ScreenTypeIs("dialog") {
+	if e.KContext.ScreenTypeIs(entity.DialogScreenType) {
 		e.DialogDraw(screen)
 	}
-	if e.KContext.ScreenTypeIs("playground") {
+	if e.KContext.ScreenTypeIs(entity.PlaygroundScreenType) {
 		e.PlaygroundDraw(screen)
 	}
-	if e.KContext.ScreenTypeIs("inventory") {
+	if e.KContext.ScreenTypeIs(entity.InventoryScreenType) {
 		e.InventoryDraw(screen)
 	}
 	if e.Action3Pressed() {
diff --git a/konstructor/entity/entity.kcontext.go b/konstructor/entity/entity.kcontext.go
index dec2c25..7e967b5 100644
--- a/konstructor/entity/entity.kcontext.go
+++ b/konstructor/entity/entity.kcontext.go
@@ -1,7 +1,7 @@
 package entity
 
 type KContext struct {
-	ScreenType   string
+	ScreenType   ScreenType
 	ScreenValue  string
 	CurrentLevel int
 	Players      []Player
@@ -11,6 +11,6 @@ func (c *KContext) getPrimaryPlayer() Player {
 	return c.Players[0]
 }
 
-func (c *KContext) ScreenTypeIs(name string) bool {
+func (c *KContext) ScreenTypeIs(name ScreenType) bool {
 	return c.ScreenType == name
 }
diff --git a/konstructor/entity/entity.screen.go b/konstructor/entity/entity.screen.go
new file mode 100644
index 0000000..d70082f
--- /dev/null
+++ b/konstructor/entity/entity.screen.go
@@ -0,0 +1,10 @@
+package entity
+
+type ScreenType string
+
+const (
+	MenuScreenType       ScreenType = "menu"
+	DialogScreenType     ScreenType = "dialog"
+	PlaygroundScreenType ScreenType = "playground"
+	InventoryScreenType  ScreenType = "inventory"
+)
diff --git a/main.go b/main.go
index e4a49ca..abe4034 100644
--- a/main.go
+++ b/main.go
@@ -23,7 +23,7 @@ func main() {
 			},
 		},
 		KContext: &entity.KContext{
-			ScreenType:   "menu",
+			ScreenType:   entity.MenuScreenType,
 			ScreenValue:  "MainMenu",
 			CurrentLevel: 0,
 		},