diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UINewWorld.kt b/src/net/torvald/terrarum/modulebasegame/ui/UINewWorld.kt
index 047d10e0e..db7715ecc 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UINewWorld.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UINewWorld.kt
@@ -96,13 +96,16 @@ class UINewWorld(val remoCon: UIRemoCon) : UICanvas() {
 
     private val goButtonWidth = 180
     private val backButton = UIItemTextButton(this,
-        { Lang["MENU_LABEL_BACK"] }, drawX + (width/2 - goButtonWidth) / 2, drawY + height - 24, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true)
+        { Lang["MENU_LABEL_BACK"] }, drawX + (width/2 - goButtonWidth) / 2, drawY + height - 24, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
+
+        it.clickOnceListener = { _, _ ->
+            remoCon.openUI(UILoadSavegame(remoCon))
+        }
+    }
     private val goButton = UIItemTextButton(this,
-        { Lang["MENU_LABEL_CONFIRM_BUTTON"] }, drawX + width/2 + (width/2 - goButtonWidth) / 2, drawY + height - 24, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true)
+        { Lang["MENU_LABEL_CONFIRM_BUTTON"] }, drawX + width/2 + (width/2 - goButtonWidth) / 2, drawY + height - 24, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
 
-
-    init {
-        goButton.clickOnceListener = { _, _ ->
+        it.clickOnceListener = { _, _ ->
 
             // after the save is complete, proceed to new world generation
             if (existingPlayer == null) {
@@ -136,10 +139,11 @@ class UINewWorld(val remoCon: UIRemoCon) : UICanvas() {
             App.setLoadScreen(loadScreen)
 
         }
-        backButton.clickOnceListener = { _, _ ->
-            remoCon.openUI(UILoadSavegame(remoCon))
-        }
 
+    }
+
+
+    init {
         addUIitem(sizeSelector)
         addUIitem(seedInput)  // order is important
         addUIitem(nameInput) // because of the IME candidates overlay
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortal.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortal.kt
index fabb149a8..47f4f3eeb 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortal.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortal.kt
@@ -56,9 +56,7 @@ class UIWorldPortal : UICanvas(
         get() = if (App.environment == RunningEnvironment.PC)
                     "${getKeycapPC(ControlPresets.getKey("control_key_inventory"))} ${Lang["GAME_ACTION_CLOSE"]}"
         else
-                    "${App.gamepadLabelStart} ${Lang["GAME_ACTION_CLOSE"]}" +
-                    "$SP${App.gamepadLabelLT} ${Lang["GAME_WORLD_SEARCH"]}" +
-                    "$SP${App.gamepadLabelRT} ${Lang["GAME_INVENTORY"]}"
+                    "${App.gamepadLabelStart} ${Lang["GAME_ACTION_CLOSE"]}"
 
 
 
@@ -70,6 +68,7 @@ class UIWorldPortal : UICanvas(
     val transitionalDelete = UIWorldPortalDelete(this)
     val transitionalRename = UIWorldPortalRename(this)
     val transitionalShare = UIWorldPortalShare(this)
+    val transitionalUseInvitation = UIWorldPortalUseInvitation(this)
 //    val transitionalCargo = UIWorldPortalCargo(this)
     private val transitionPanel = UIItemHorizontalFadeSlide(
         this,
@@ -78,9 +77,9 @@ class UIWorldPortal : UICanvas(
         width,
         App.scr.height,
         0f,
-         listOf(transitionalListing),
+        listOf(transitionalListing),
         listOf(transitionalSearch, transitionalDelete, transitionalRename, transitionalShare),
-        listOf()
+        listOf(transitionalUseInvitation)
     )
 
     internal var selectedButton: UIItemWorldCellsSimple? = null
@@ -89,6 +88,7 @@ class UIWorldPortal : UICanvas(
     internal fun queueUpDeleteScr() { transitionPanel.setCentreUIto(1) }
     internal fun queueUpRenameScr() { transitionPanel.setCentreUIto(2) }
     internal fun queueUpShareScr()  { transitionPanel.setCentreUIto(3) }
+    internal fun queueUpUseInvitationScr() { transitionPanel.setRightUIto(0) }
 
     internal fun changePanelTo(index: Int) {
         transitionPanel.requestTransition(index)
@@ -200,58 +200,6 @@ class UIWorldPortal : UICanvas(
         UIItemInventoryItemGrid.tooltipShowing.clear()
         INGAME.setTooltipMessage(null) // required!
     }
-
-    override fun inputStrobed(e: TerrarumKeyboardEvent) {
-        super.inputStrobed(e)
-        transitionPanel.uis.forEach { it.inputStrobed(e) }
-    }
-
-    override fun touchDragged(screenX: Int, screenY: Int, pointer: Int): Boolean {
-        super.touchDragged(screenX, screenY, pointer)
-        transitionPanel.uis.forEach { it.touchDragged(screenX, screenY, pointer) }
-        return true
-    }
-
-    override fun touchDown(screenX: Int, screenY: Int, pointer: Int, button: Int): Boolean {
-        super.touchDown(screenX, screenY, pointer, button)
-        transitionPanel.uis.forEach { it.touchDown(screenX, screenY, pointer, button) }
-        return true
-    }
-
-    override fun touchUp(screenX: Int, screenY: Int, pointer: Int, button: Int): Boolean {
-        super.touchUp(screenX, screenY, pointer, button)
-        transitionPanel.uis.forEach { it.touchUp(screenX, screenY, pointer, button) }
-        return true
-    }
-
-    override fun scrolled(amountX: Float, amountY: Float): Boolean {
-        super.scrolled(amountX, amountY)
-        transitionPanel.uis.forEach { it.scrolled(amountX, amountY) }
-        return true
-    }
-
-    override fun keyDown(keycode: Int): Boolean {
-        super.keyDown(keycode)
-        transitionPanel.uis.forEach { it.keyDown(keycode) }
-        return true
-    }
-
-    override fun keyUp(keycode: Int): Boolean {
-        super.keyUp(keycode)
-        transitionPanel.uis.forEach { it.keyUp(keycode) }
-        return true
-    }
-
-    override fun keyTyped(character: Char): Boolean {
-        super.keyTyped(character)
-        transitionPanel.uis.forEach { it.keyTyped(character) }
-        return true
-    }
-
-    override fun resize(width: Int, height: Int) {
-        super.resize(width, height)
-        transitionPanel.uis.forEach { it.resize(width, height) }
-    }
 }
 
 class UIItemWorldPortalTopBar(
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalSearch.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalSearch.kt
index f2910d302..80166cf57 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalSearch.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalSearch.kt
@@ -88,6 +88,10 @@ class UIWorldPortalSearch(val full: UIWorldPortal) : UICanvas() {
     private val useInvitationButton = UIItemTextButton(this,
         { Lang["MENU_LABEL_USE_CODE"] }, buttonBaseX + goButtonWidth + gridGap, buttonY, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
 
+        it.clickOnceListener = { _, _ ->
+            full.queueUpUseInvitationScr()
+            full.requestTransition(2)
+        }
     }
     private val goButton: UIItemTextButton = UIItemTextButton(this,
         { Lang["MENU_LABEL_CONFIRM_BUTTON"] }, buttonBaseX + (goButtonWidth + gridGap) * 2, buttonY, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
@@ -225,17 +229,13 @@ class UIWorldPortalSearch(val full: UIWorldPortal) : UICanvas() {
 
         // control hints
         batch.color = Color.WHITE
-        App.fontGame.draw(batch, full.portalListingControlHelp, 16 + (Toolkit.drawWidth - width)/2 + 2, (full.yEnd - 20).toInt())
+        App.fontGame.draw(batch, full.portalListingControlHelp, 2 + (Toolkit.drawWidth - 560)/2 + 2, (full.yEnd - 20).toInt())
 
         uiItems.forEach { it.render(batch, camera) }
 
         oldPosX = posX
     }
 
-    override fun hide() {
-        uiItems.forEach { it.hide() }
-    }
-
     override fun dispose() {
         hugeTex.texture.dispose()
         largeTex.texture.dispose()
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalShare.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalShare.kt
index ff975c880..c095cd543 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalShare.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalShare.kt
@@ -6,6 +6,7 @@ import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.App
 import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.INGAME
+import net.torvald.terrarum.gamecontroller.TerrarumKeyboardEvent
 import net.torvald.terrarum.imagefont.BigAlphNum
 import net.torvald.terrarum.langpack.Lang
 import net.torvald.terrarum.serialise.toBig64
@@ -16,7 +17,7 @@ import net.torvald.terrarum.utils.PasswordBase32
 
 class UIWorldPortalShare(private val full: UIWorldPortal) : UICanvas() {
 
-    override var width = 426
+    override var width = 434
     override var height = 400
 
     private val drawX = (Toolkit.drawWidth - width) / 2
@@ -63,7 +64,7 @@ class UIWorldPortalShare(private val full: UIWorldPortal) : UICanvas() {
     override fun renderUI(batch: SpriteBatch, camera: OrthographicCamera) {
         batch.color = Color.WHITE
 
-        val textY = drawY + (height/2) - App.fontGame.lineHeight.toInt() * 4
+        val textY = drawY + (height/2) - App.fontGame.lineHeight.toInt() * 4 - 2
         val codeY = textY + App.fontGame.lineHeight.toInt() * 5
 
         // share code background
@@ -107,4 +108,5 @@ class UIWorldPortalShare(private val full: UIWorldPortal) : UICanvas() {
     override fun doClosing(delta: Float) {
         full.selectedButton?.forceMouseDown = false
     }
+
 }
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalUseInvitation.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalUseInvitation.kt
new file mode 100644
index 000000000..e101dd725
--- /dev/null
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortalUseInvitation.kt
@@ -0,0 +1,98 @@
+package net.torvald.terrarum.modulebasegame.ui
+
+import com.badlogic.gdx.graphics.Color
+import com.badlogic.gdx.graphics.OrthographicCamera
+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import net.torvald.terrarum.App
+import net.torvald.terrarum.gamecontroller.TerrarumKeyboardEvent
+import net.torvald.terrarum.langpack.Lang
+import net.torvald.terrarum.printStackTrace
+import net.torvald.terrarum.savegame.VirtualDisk
+import net.torvald.terrarum.ui.*
+import net.torvald.terrarum.utils.RandomWordsName
+
+/**
+ * Created by minjaesong on 2023-09-03.
+ */
+class UIWorldPortalUseInvitation(val full: UIWorldPortal) : UICanvas() {
+
+    override var width = 480
+    override var height = 480
+
+    private val drawX = (Toolkit.drawWidth - width) / 2
+    private val drawY = (App.scr.height - height) / 2
+
+    private val inputWidth = 350
+    private val inputLineY1 = 90
+    private val inputLineY2 = 130
+
+    private val sizeSelY = 186 + 40
+    private val goButtonWidth = 180
+    private val gridGap = 10
+    private val buttonBaseX = (Toolkit.drawWidth - 3 * goButtonWidth - 2 * gridGap) / 2
+    private val buttonY = drawY + height - 24
+
+
+    private val codeInput = UIItemTextLineInput(this,
+        drawX + width - inputWidth + 5, drawY + sizeSelY + inputLineY1, inputWidth,
+        { "AAAA BB CCCCC DDDDD EEEEE FFFFF" }, InputLenCap(VirtualDisk.NAME_LENGTH, InputLenCap.CharLenUnit.UTF8_BYTES)
+    )
+
+
+
+    private val backButton = UIItemTextButton(this,
+        { Lang["MENU_LABEL_BACK"] }, buttonBaseX, buttonY, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
+
+        it.clickOnceListener = { _, _ ->
+            full.requestTransition(0)
+        }
+    }
+    private val searchWorldButton = UIItemTextButton(this,
+        { Lang["CONTEXT_WORLD_NEW"] }, buttonBaseX + goButtonWidth + gridGap, buttonY, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
+
+        it.clickOnceListener = { _, _ ->
+            full.queueUpSearchScr()
+            full.requestTransition(1)
+        }
+    }
+    private val goButton: UIItemTextButton = UIItemTextButton(this,
+        { Lang["MENU_LABEL_CONFIRM_BUTTON"] }, buttonBaseX + (goButtonWidth + gridGap) * 2, buttonY, goButtonWidth, alignment = UIItemTextButton.Companion.Alignment.CENTRE, hasBorder = true).also {
+
+        it.clickOnceListener = { _, _ ->
+
+        }
+    }
+
+    init {
+        addUIitem(backButton)
+        addUIitem(searchWorldButton)
+        addUIitem(goButton)
+        addUIitem(codeInput)
+    }
+
+    override fun updateUI(delta: Float) {
+        uiItems.forEach { it.update(delta) }
+    }
+
+    override fun renderUI(batch: SpriteBatch, camera: OrthographicCamera) {
+
+        // input labels
+        batch.color = Color.WHITE
+        App.fontGame.draw(batch, Lang["CREDITS_CODE"], drawX - 4, drawY + sizeSelY + inputLineY1)
+
+        // control hints
+        App.fontGame.draw(batch, full.portalListingControlHelp, 2 + (Toolkit.drawWidth - 560)/2 + 2, (full.yEnd - 20).toInt())
+
+
+        uiItems.forEach { it.render(batch, camera) }
+    }
+
+    override fun dispose() {
+    }
+
+
+    override fun inputStrobed(e: TerrarumKeyboardEvent) {
+        super.inputStrobed(e)
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/ui/UICanvas.kt b/src/net/torvald/terrarum/ui/UICanvas.kt
index a9f616367..86fbd7ac6 100644
--- a/src/net/torvald/terrarum/ui/UICanvas.kt
+++ b/src/net/torvald/terrarum/ui/UICanvas.kt
@@ -5,6 +5,7 @@ import com.badlogic.gdx.graphics.OrthographicCamera
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.utils.Disposable
 import net.torvald.terrarum.App
+import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.Second
 import net.torvald.terrarum.Terrarum
 import net.torvald.terrarum.gamecontroller.TerrarumKeyboardEvent
diff --git a/src/net/torvald/terrarum/ui/UIItemTransitionContainer.kt b/src/net/torvald/terrarum/ui/UIItemTransitionContainer.kt
index eee11a3f0..06ca3ad25 100644
--- a/src/net/torvald/terrarum/ui/UIItemTransitionContainer.kt
+++ b/src/net/torvald/terrarum/ui/UIItemTransitionContainer.kt
@@ -8,6 +8,7 @@ import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.App
 import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.gamecontroller.TerrarumKeyboardEvent
+import kotlin.math.roundToInt
 
 open class UIItemTransitionContainer(
     private val parent: UICanvas,
@@ -55,6 +56,9 @@ open class UIItemTransitionContainer(
 
     open fun onTransition(currentPosition: Float, uis: List<UICanvas>) {}
 
+    open val currentUI: UICanvas
+        get() = uis[currentPosition.roundToInt()]
+
     override fun render(batch: SpriteBatch, camera: OrthographicCamera) {
         super.render(batch, camera)
 
@@ -98,17 +102,17 @@ open class UIItemTransitionContainer(
     }
 
     override fun keyDown(keycode: Int): Boolean {
-        uis.forEachIndexed { index, ui -> if (timeToUpdate(index)) ui.keyDown(keycode) }
+        currentUI.keyDown(keycode)
         return true
     }
 
     override fun keyUp(keycode: Int): Boolean {
-        uis.forEachIndexed { index, ui -> if (timeToUpdate(index)) ui.keyUp(keycode) }
+        currentUI.keyUp(keycode)
         return true
     }
 
     override fun touchDragged(screenX: Int, screenY: Int, pointer: Int): Boolean {
-        uis.forEachIndexed { index, ui -> if (timeToUpdate(index)) ui.touchDragged(screenX, screenY, pointer) }
+        currentUI.touchDragged(screenX, screenY, pointer)
         return true
     }
 
@@ -128,7 +132,7 @@ open class UIItemTransitionContainer(
     }
 
     override fun inputStrobed(e: TerrarumKeyboardEvent) {
-        uis.forEachIndexed { index, ui -> if (timeToUpdate(index)) ui.inputStrobed(e) }
+        currentUI.inputStrobed(e)
     }
 
     override fun show() {