diff --git a/src/activities/intro_gravity/ActivityInfo.qml b/src/activities/intro_gravity/ActivityInfo.qml
--- a/src/activities/intro_gravity/ActivityInfo.qml
+++ b/src/activities/intro_gravity/ActivityInfo.qml
@@ -29,7 +29,7 @@
   description: qsTr("Introduction to the concept of gravity")
   //intro: "Change the planets' gravitational force by moving the sliders up and down. Be careful not to crash Tux's spaceship."
   //: Help goal
-  goal: qsTr("Maintain the spaceship in the middle without crashing into the planets or the asteroids")
+  goal: qsTr("Maintain the spaceship in the middle without crashing into the planets or the asteroids and join the space shuttle")
   //: Help prerequisite
   prerequisite: ""
   //: Help manual
diff --git a/src/activities/intro_gravity/intro_gravity.js b/src/activities/intro_gravity/intro_gravity.js
--- a/src/activities/intro_gravity/intro_gravity.js
+++ b/src/activities/intro_gravity/intro_gravity.js
@@ -37,7 +37,6 @@
 var asteroidsErased = new Array;
 
 var minDuration = 20000
-var asteroidCounter
 
 var items;
 var message;
@@ -56,7 +55,6 @@
     items.shuttleMotion.stop()
     destroyAsteroids(asteroids)
     destroyAsteroids(asteroidsErased)
-    asteroidCounter = 0
 }
 
 function initLevel() {
@@ -145,7 +143,6 @@
 
     asteroids.push(asteroid);
     asteroid.startMoving()
-    asteroidCounter++
 }
 
 function destroyAsteroids(asteroids) {
@@ -180,6 +177,14 @@
         items.spaceship.source = ""
         stop()
     }
+
+    // If shuttle moves away to the top
+    if(items.shuttle.y < 0 - items.shuttle.height/2) {
+        items.shuttle.x =  Math.random() > 0.5 ?
+                    items.background.width * 0.2 : items.background.width * 0.7
+        items.shuttle.y = items.background.height + items.shuttle.height
+        items.shuttleMotion.restart()
+    }
 }
 
 function handleCollisionWithAsteroid() {
@@ -201,12 +206,6 @@
                 crash()
                 return
             }
-            if(asteroidCounter == 4) {
-                items.bonus.good("flower")
-                stop()
-                return
-            }
-
         }
     }
 }