diff --git a/app/src/main/ic_launcher-web.png b/app/src/main/ic_launcher-web.png
new file mode 100644
index 0000000..e35410e
Binary files /dev/null and b/app/src/main/ic_launcher-web.png differ
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/GameController.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/GameController.java
index 2c0ed89..ef1d1b1 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/GameController.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/GameController.java
@@ -179,10 +179,16 @@ public class GameController implements IModelChangedListener, Parcelable {
 
         int[] solved = solve();
         // and reveal the selected value.
-        selectValue(solved[selectedRow * getSize() + selectedCol]);
+        int value = solved[selectedRow * getSize() + selectedCol];
+        setValue(selectedRow, selectedCol, value);
+        // add state to undo
+        undoRedoManager.addState(gameBoard);
+        highlightValue = value;
+
         usedHints++;
 
         notifyHintListener();
+        notifyHighlightChangedListeners();
     }
 
     private void setGameType(GameType type) {
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/src/main/res/mipmap-hdpi/ic_launcher.png
index cde69bc..23aec25 100644
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher.png and b/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher.png b/app/src/main/res/mipmap-mdpi/ic_launcher.png
index c133a0c..0cb2849 100644
Binary files a/app/src/main/res/mipmap-mdpi/ic_launcher.png and b/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/src/main/res/mipmap-xhdpi/ic_launcher.png
index bfa42f0..2bdc999 100644
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
index 324e72c..23a5257 100644
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
index aee44e1..625fe9f 100644
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ