diff --git a/examples/tilt-sensor/lisp/main.lisp b/examples/tilt-sensor/lisp/main.lisp
index 62b16f2..bd95040 100644
--- a/examples/tilt-sensor/lisp/main.lisp
+++ b/examples/tilt-sensor/lisp/main.lisp
@@ -5,6 +5,8 @@
 (defvar *x*)         ; ball x
 (defvar *y*)         ; ball y
 
+(defvar *max-x* (* (1- *width*) +w+))
+
 (defun move (x-rotation y-rotation) ; called from QML
   (labels ((add (x)
              (truncate (signum x)))
@@ -19,6 +21,7 @@
            (dy (min (* 0.2 x-rotation) (1- +w+)))
            (add-x (add dx))
            (add-y (add dy)))
+      (setf *x* (min *x* *max-x*)) ; don't lose ball (initial x)
       (if (aref *maze*
                 (+ add-x (to-pos *x*))
                 (to-pos *y*))
diff --git a/examples/tilt-sensor/lisp/maze.lisp b/examples/tilt-sensor/lisp/maze.lisp
index 28c07a8..8bf281b 100644
--- a/examples/tilt-sensor/lisp/maze.lisp
+++ b/examples/tilt-sensor/lisp/maze.lisp
@@ -51,7 +51,7 @@
       (set-visible x y (aref *maze* x y)))))
 
 (defun new-maze ()
-  (setf *maze* (make-array (list (1+ *width*) (1+ *height*))
+  (setf *maze* (make-array (list *width* *height*)
                            :initial-element t))
   (display-maze)
   (qlater 'generate-maze))
diff --git a/readme-qml-live-preview-and-slime.md b/readme-qml-live-preview-and-slime.md
index 2e48735..8f6f4a5 100644
--- a/readme-qml-live-preview-and-slime.md
+++ b/readme-qml-live-preview-and-slime.md
@@ -4,9 +4,9 @@ development, the simple `-auto` option of `lqml run.lisp` may be more
 appropriate, because it allows for re-initialization (calling Lisp code) after
 reloading QML.*
 
-*The above method also works on mobile, please see example `swank-server`. It
-doesn't depend on Swank, and should therefore also be stable (it uses a local
-trivial web server).*
+*The above method also works on mobile, please see example
+`advanced-qml-auto-realod`. It doesn't depend on Swank, and should therefore
+also be stable (it uses a local trivial web server).*
 
 *You may even run both desktop and (one or more) mobile device auto reloads
 simultaneously (`swank-server` example only), because they all watch/load the