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I was suggesting something like this: <Code Omitted>

Thank you very much! Everything works perfectly!

@kristal, although I cannot say how JetLennit solved this, I can say how I would solve it (which is a bit different from the method used above). I would add a method in the Crate class for moving the crate. The method would check to see if it can move in the direction given as parameter value(s), move in that direction (if possible), and return a boolean value (true/false) to indicate whether it moved or not. The method could start something like this: <Code Omitted>Then, the code to move or move while pushing a crate in the Player class could use l

Got it. Thank you!

Edit last post: Line 28 should be the following of course: <Code Omitted>

By instance reference field, yes. However, you do not need a 'Score1' and a 'Score2' class; you just need a 'Score' class that you create two instance objects with: <Code Omitted>The 'get' methods will allow obj

It does not have to be coming directly from you. Dormant malware is not non-existent.

Ah! Thank you!!

It couldn't possibly compile, for the reasons I gave above - the score_field variable is not accessible from the method in which you use it. Are you now talking about different code (perhaps the second variant that you posted originally)?

With what exactly do you need help?

Ok. You should read over the documentation for both the World and Actor classes in the API reference. You will see that they both have an "act" method. (Furthermore, you can put an "act" method in any class, though it will not have any special significance to Greenfoot unless it's in a World or Actor subclass).

It looks like you are creating a healthbar for the laser, which is not the same healthbar that you have in your Ship class. Remove line 12 and change line 50 to: <Code Omitted>You should, however, refrain from using the same name of a class as a variable name. That is, you should use something like 'Actor ship;' instead of 'Actor Ship;'. I noticed that your 'life' field starts at zero and is decreased from there. It will never be checked and found to be zero (see lines 21 through 25) . Also after that (line 26),, you are using a method that requires the actor

The 'checkHit' method now returns a boolean. So if the Laser objects touches a SpaceFly, it will return true. Then, or if it is at an edge of the world (only top or bottom as it is right now), it will be removed from the world.