diff --git a/commonUI/src/commonMain/composeResources/drawable/action-restart.xml b/commonUI/src/commonMain/composeResources/drawable/action-restart.xml
new file mode 100644
index 0000000..0eb92ea
--- /dev/null
+++ b/commonUI/src/commonMain/composeResources/drawable/action-restart.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M360,840L303,784L367,720L360,720Q243,720 161.5,638.5Q80,557 80,440Q80,323 161.5,241.5Q243,160 360,160L600,160Q717,160 798.5,241.5Q880,323 880,440Q880,557 798.5,638.5Q717,720 600,720L600,640Q683,640 741.5,581.5Q800,523 800,440Q800,357 741.5,298.5Q683,240 600,240L360,240Q277,240 218.5,298.5Q160,357 160,440Q160,523 218.5,582.5Q277,642 360,648L376,648L304,576L360,520L520,680L360,840Z"/>
+</vector>
diff --git a/commonUI/src/commonMain/kotlin/ch/dissem/yaep/ui/common/App.kt b/commonUI/src/commonMain/kotlin/ch/dissem/yaep/ui/common/App.kt
index 9ab4c0f..83033d9 100644
--- a/commonUI/src/commonMain/kotlin/ch/dissem/yaep/ui/common/App.kt
+++ b/commonUI/src/commonMain/kotlin/ch/dissem/yaep/ui/common/App.kt
@@ -32,6 +32,7 @@ import androidx.compose.ui.unit.TextUnit
 import androidx.compose.ui.unit.TextUnitType
 import androidx.compose.ui.unit.dp
 import ch.dissem.yaep.domain.Clue
+import ch.dissem.yaep.domain.Game
 import ch.dissem.yaep.domain.Grid
 import ch.dissem.yaep.domain.HorizontalClue
 import ch.dissem.yaep.domain.ItemClass
@@ -39,7 +40,6 @@ import ch.dissem.yaep.domain.NeighbourClue
 import ch.dissem.yaep.domain.OrderClue
 import ch.dissem.yaep.domain.SameColumnClue
 import ch.dissem.yaep.domain.TripletClue
-import ch.dissem.yaep.domain.generateGame
 import org.jetbrains.compose.resources.painterResource
 import yaep.commonui.generated.resources.Res
 import yaep.commonui.generated.resources.neighbour
@@ -59,10 +59,9 @@ class DisplayClue<C : Clue>(val clue: C) {
 }
 
 @Composable
-fun App(modifier: Modifier = Modifier) {
-    var game by remember { mutableStateOf(generateGame()) }
-    val horizontalClues = remember(game) { game.horizontalClues.map { DisplayClue(it) } }
-    val verticalClues = remember(game) { game.verticalClues.map { DisplayClue(it) } }
+fun App(modifier: Modifier = Modifier, game: Game, onNewGame: () -> Unit, resetCluesBeacon: Any = Any()) {
+    val horizontalClues = remember(game, resetCluesBeacon) { game.horizontalClues.map { DisplayClue(it) } }
+    val verticalClues = remember(game, resetCluesBeacon) { game.verticalClues.map { DisplayClue(it) } }
     val timer = remember(game) { GameTimer() }
     val time by timer.elapsedTime.collectAsState("00:00")
     var isSolved by remember(game) { mutableStateOf(false) }
@@ -104,9 +103,7 @@ fun App(modifier: Modifier = Modifier) {
                 Text(time, fontSize = TextUnit(4f, TextUnitType.Em))
             }
         }
-        EndOfGame(isSolved = isSolved, time = time) {
-            game = generateGame()
-        }
+        EndOfGame(isSolved = isSolved, time = time, onRestart = onNewGame)
     }
 }
 
diff --git a/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/desktop window.kt b/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/desktop window.kt
index 08cce0a..4125aac 100644
--- a/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/desktop window.kt	
+++ b/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/desktop window.kt	
@@ -1,3 +1,5 @@
+package ch.dissem.yaep.ui.desktop
+
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Spacer
@@ -14,17 +16,25 @@ import androidx.compose.material3.SwitchDefaults
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.scale
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.WindowPlacement
 import androidx.compose.ui.window.WindowScope
 import androidx.compose.ui.window.WindowState
+import ch.dissem.yaep.domain.Game
 import ch.dissem.yaep.ui.common.theme.AppTheme
 import org.jetbrains.compose.resources.painterResource
 import org.jetbrains.compose.resources.stringResource
+import yaep.commonui.generated.resources.action_restart
 import yaep.commonui.generated.resources.app_name_full
 import yaep.commonui.generated.resources.moon
+import yaep.commonui.generated.resources.restart
 import yaep.commonui.generated.resources.sun
 import yaep.commonui.generated.resources.window_close
 import yaep.commonui.generated.resources.window_maximize
@@ -58,8 +68,17 @@ fun AppBar(
     useDarkMode: Boolean,
     setDarkMode: (Boolean) -> Unit,
     onCloseRequest: () -> Unit,
+    onRestart: () -> Unit,
     windowState: WindowState,
+    game: Game,
 ) {
+    var gameSolved by remember { mutableStateOf(false) }
+    LaunchedEffect(game) {
+        game.onSolved {
+            gameSolved = true
+        }
+    }
+
     TopAppBar(
         navigationIcon = {
             Image(
@@ -70,6 +89,16 @@ fun AppBar(
         },
         title = { Text(text = stringResource(CRes.string.app_name_full)) },
         actions = {
+            IconButton(
+                onClick = onRestart
+            ) {
+                Icon(
+                    painter = painterResource(CRes.drawable.action_restart),
+                    contentDescription = stringResource(CRes.string.restart),
+                    modifier = Modifier.size(SwitchDefaults.IconSize),
+                )
+            }
+            Spacer(Modifier.width(8.dp))
             Switch(
                 checked = useDarkMode,
                 onCheckedChange = setDarkMode,
@@ -98,6 +127,7 @@ fun AppBar(
                 )
             }
             IconButton(
+                enabled = !gameSolved,
                 onClick = {
                     windowState.placement =
                         if (windowState.placement == WindowPlacement.Maximized)
diff --git a/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/main.kt b/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/main.kt
index d0e63c9..16aa1e3 100644
--- a/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/main.kt
+++ b/desktop/src/main/kotlin/ch/dissem/yaep/ui/desktop/main.kt
@@ -14,8 +14,12 @@ import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.WindowPlacement
 import androidx.compose.ui.window.application
 import androidx.compose.ui.window.rememberWindowState
+import ch.dissem.yaep.domain.Game
+import ch.dissem.yaep.domain.generateGame
 import ch.dissem.yaep.ui.common.App
 import ch.dissem.yaep.ui.common.theme.emojiFontFamily
+import ch.dissem.yaep.ui.desktop.AppBar
+import ch.dissem.yaep.ui.desktop.DesktopWindow
 import org.jetbrains.compose.resources.painterResource
 import org.jetbrains.compose.resources.stringResource
 import yaep.commonui.generated.resources.app_name
@@ -35,6 +39,7 @@ fun main() = application {
         placement = WindowPlacement.Floating,
         size = DpSize(1200.dp, 800.dp)
     )
+    var game by remember { mutableStateOf<Game>(generateGame()) }
 
     Window(
         onCloseRequest = ::exitApplication,
@@ -44,6 +49,7 @@ fun main() = application {
         icon = painterResource(DRes.drawable.ic_launcher)
     ) {
         var useDarkMode by remember { mutableStateOf(true) }
+        var resetCluesBeacon by remember { mutableStateOf(Any()) }
         DesktopWindow(
             useDarkMode = useDarkMode,
             topBar = {
@@ -51,11 +57,21 @@ fun main() = application {
                     useDarkMode = useDarkMode,
                     setDarkMode = { useDarkMode = it },
                     onCloseRequest = ::exitApplication,
-                    windowState = windowState
+                    onRestart = {
+                        do while (game.grid.undo());
+                        resetCluesBeacon = Any()
+                    },
+                    windowState = windowState,
+                    game = game,
                 )
             }
         ) {
-            App(modifier = Modifier.padding(it))
+            App(
+                modifier = Modifier.padding(it),
+                game = game,
+                onNewGame = { game = generateGame() },
+                resetCluesBeacon = resetCluesBeacon
+            )
         }
     }
 }
\ No newline at end of file
diff --git a/domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Game.kt b/domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Game.kt
index f309ca1..a7f4047 100644
--- a/domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Game.kt
+++ b/domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Game.kt
@@ -37,6 +37,7 @@ class Game(
                 }
             }
         }
+        grid.snapshot()
     }
 
     fun onStart(listener: () -> Unit) {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8099cf5..0b60412 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-agp = "8.9.0"
+agp = "8.9.2"
 jdk = "21"
 android-compileSdk = "35"
 android-minSdk = "24"