The following is a simple tutorial to create a ball pop game.
Start by adding your background 2d image object to the world or using a 3d environment, you can create a 2d image object with just an image and our ImageModelBuilder, included in all thinking worlds installations.
Add your object to the world, which will be your target for the user to click, I've used a simple circle image.
Position 2 markers at either side of your map, this will be the path which your target will travel between, I've used 2 sets of markers to create 2 separate paths.
Position a game camera above the map, this will be the main game camera.
I start my logic by generating a random number either 0 or 1, this will be used to determine which path the target will travel, I then add the target object to the world. The object then follows the generated path. The path moves the object to the start marker instantly and moves it to the second over 2 seconds. Once complete the logic is looped back to the start, for the target to follow another path.
Another group of logic, checks if the target has been clicked, if so removes the object from the scene preforming a particle effect in the process, this is how when the user clicks the target you get the explosion.
The final bit of logic selects the game camera as the main camera, the other two groups are also linked to the scene start node.
I have included the above sample, so that you may examine and change my logic. You will need to extract my journey and import my assets.
As well you can also download GroovyGame from the content section HERE, The logic is fundamentally the same with more advanced techniques and game elements.