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Code the behavior of each actor in their own class. HINT: it is the behavior of the Ice objects to move anything on them with it. Therefore, Bailey will have its own movement, coded in its own class, plus the movement provided by the Ice object it may be on, coded in the Ice class.

Awesome. Thanks.

A class is capable of creating multiple objects of the same type and therefore 'Space' is not specific enough to indicate which world will execute 'Loselife'. Using 'getWorld' will return the correct World object to execute the method on; however that is still not enough because it does not specifically return a Space object which is necessary to execute the method located in that class. We must inform the system that it is indeed a Space object through typecasting: <Code Omitted>

If you want to check for a collision with Shiny class then do: <Code Omitted>

In your act method just do: <Code Omitted>The for loop will make the variable 'num' be equal to 32 so the image will always be "Wall1.png". So basically if isTouching(Lazer.class) or not (else) num will be equal to 32. The for loop doesn't make sense because you're setting num = i but there is no other code being

The '%' is the remainder operator. It returns the remainder of the two dividends instead of returning a double (decimal number). So 100 / 55 = 1818181818... (1 + 9/11), but 100 % 55 = 45. So if you do == 0 afterwards that means that there is no remainder meaning that the number is a multiple of 55. The code above will show a 1 when time == 55 and a 2 when time == 110 and so on.

You will only get either 1 or 0 bars since in each case in the switch statement there is only 1 addObject.

Thank you so much! I got it! Sorry for the really long conversation, but it was worth it! Thanks heaps! :)

A button is just an Actor object with one or more possible images that clicks are detected on. I consider a button to be a simple Actor object, meaning no state or implementation need be added into its class. You could simply have this class, which is the entire class: <Code Omitted>Then, create an object from the class, give it an image and test for clicks on it:

The Score object reference field, 'score', in your Enemy1 class is never assigned a Score object and nowhere in the codes given do I see 'new Score()'.

The alien or the laser (whichever is performing the collision detection between the two objects) needs to obtain a reference to the counter object. Usually with something like this (if only one counter object is in the world): <Code Omitted>

Give a specific example of what you want to do. The topic is too broad to be answered fully here.

What are you using for images? Are you creating them programmatically -- or do you have different images of the same object in different colors?

Okay, remove that line I had you put in after line 50 and add the following line at line 81 (using the line numbers of the full class code above): <Code Omitted>

You can save up to 5 Strings with each up to 50 characters (for each user) with the UserInfo class provided by Greenfoot. It saves them into a .csv file and can get the data from it. You can obviously doing the same with writing the text into a .txt file, but this is not as easy as with the UserInfo class. There are some examples here on the site how to write to a .txt file I doubt that Droidfoot has this option though, but I don't know.