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Also, line 3, within a for loop, is troublesome because you a scaling the same image multiple times, which never works well. Best is to save the original image in an instance field, and on each iteration of the loop, create a copy of that image and then scale the copy once.

Show all methods and fields that deal with the coin counter and indicate the classes each code block/field is in.

Please have a look at https://www.greenfoot.org/topics/64967/0 There is a menu to choose which ship the hero is flying. You can reuse it for your idea, especially adding buttons for each position to the chooser-menu. At the button action, you can also add a check whether the hero has enough coins and the reduction of coins when the number of coins is sufficient. You can also add booleans to the hero class to indicate whether the effects are already bought. Please let me know whether this helps, otherwise just add additional questions as response here to resolve any remaining problems.

The problem is probably the check "x>=0 ||x==getWorld().getWidth()". The first part checks whether x is greater or equal 0, which is always true. But I think you want to check whether x is less or equal. Note, that you need two simple ideas as the basis for the reflecting: 1. If the fish bounces off top or bottom, its new rotation is 360-oldValue. 2. If the fish bounces off left or right, its new rotation is 180-oldValue. A simple source code to implement this:

ok, but, could you send me a code, as an example, if you can

Use Actor type objects to display clickable text. Use World objects for different screens (probably).

Need codes for Robby2 constructor and for randonSpawn method.

It seems that "this.paddle" is null. Therefore: 1. Please give the source code where the constructor is called (new Ball(..., ...)). (if the first parameter is null, we found the problem) 2. Please change the line "public Paddle paddle;" to "private final Paddle paddle;". This ensures that the constructor is the only place "this.paddle" is set (otherwise one would have to check whether paddle gets changed somewhere else in the source code).

Never mind, I figured it out.

sorry to say I decided not to submit anything and fail my course. I just lost interest in programming :<

Add instance fields to the class of the character to signify that (1) potion was touched; and (2) coin was picked up. Use them to control the behavior of the character in the act method. Attempt some codes and if you run into trouble, show codes attempted for assistance.

Try the following field in your MyWorld class (or your game world class): <Code Omitted>with the following line in your MyWorld constructor block: <Code Omitted>and the following in your MyWorld act method: <Code Omitted> Then when policeman collides with coin, set the field to some positive value -- 60 units per second of stu

Oh, okay and thanks a lot for the explanation and all

Thank you SO much it works perfectly

Thank yall for the answers. I got an easy solution but the explanation is very helpful :)