diff -r 55b2e1d3ad2b -r 03bec9dcc860 minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java
--- a/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Sat Feb 08 10:07:55 2014 +0100
+++ b/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Mon Feb 10 16:50:08 2014 +0100
@@ -31,6 +31,7 @@
 import net.java.html.json.Model;
 import net.java.html.json.ModelOperation;
 import net.java.html.json.Property;
+import net.java.html.sound.AudioClip;
 
 /** Model of the mine field.
  */
@@ -218,6 +219,7 @@
         }
     }
     
+    private static final AudioClip TOUCH = AudioClip.create("move.mp3");
     @Function static void click(Mines model, Square data) {
         if (model.getState() != GameState.IN_PROGRESS) {
             return;
@@ -229,6 +231,7 @@
                     showAllBombs(model, SquareType.EXPLOSION);
                     model.setState(GameState.LOST);
                 } else {
+                    TOUCH.play();
                     expandKnown(model, data);
                 }
             break;