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It really is not bad. Just needs to press Ctrl-I to fix indentation. There may be one or two squiggly brackets that are not consistent with the rest of the code, but otherwise it is quite good.

Please use the code tags.. you guys make me cry.

Exactly. Thats why you send your teacher the Project File and a compiled jar file. You dont have to mess with your code just so you cant move objects in the IDE. Thats just stupid.

I agree.

No, I am pretty sure Greenfoot itself needs to be updated to work with a new version. (If it is planned to support it in the future.)

Not when using 'playSound'. For multiple sounds where volume is controlled, do not use a field as in the first way above. Instead, create the GreenfootSound object in the code itself when firing the dart: <Code Omitted>

That link shows how to make a score counter; but, that is not the issue here (thanks for trying to help, anyway). The issue here was coming up with a condition that will satisfy the particular needs of this game for scoring:

That segment so that each and every item, including duplicates, listed has an equal chance of being selected. As each item is selected, it is removed from the selectable items before the next choice. Added more documentation below:

I agree. I don't even bother reading through a mess of plain text when using code tags is so simple.

Oh nevermind I made it work. Thank you very much guys for helping me with this one I appreciate it . Have a good day !

Doing what Yehuda suggests will have the discs reversing directions. This will not be visually appealing as discs bounce off one another. Having the discs exchange their direction values might be a little better, but still will not appear to be a normal bounce. To create a real looking bounce, the size of the discs, as well as direction and speed, and their world locations at the time the bounce occurs must all be taken into account. It gets quite complicated. From what you wrote above:

Also, change line 26 to: <Code Omitted>Unless MyWorld is the name of a MouseInfo subclass.

Remove the following import lines: <Code Omitted>

Please use image name on site -- not just site name. That is, the link need to end with the image file format extension (usually ".png", ".jpg" -- aka ".jpeg" -- or ".gif").