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For two actors to interact, usually proximity is involved. In this case, actual contact (touching or intersecting). That is where you must begin. Make use of the Actor class API documentation to see what you can use from it. Then, at least begin to build some code that you think might work. If you are finding that difficult. Break the problem down into simple steps -- like for what is required (1) movement of player (horizontal or vertically -- not both at the same time); (2) contact with platform (direc

it worked thanks so much i feel dumb now cuz i fixed that same problem for my other boss fight lol XD.

Okay, quite embarrassing, but there is an invisible box i didn't spot. i trimmed them all in a photo editor now :P everything works as intended, lol! frustrated me for hours...

ok thx!

I am not sure what you mean by "how to make a GIF image displacement when leaping?". Can you please explain what should be happening and how the behavior currently differs from what you want.

You cannot use collision checking methods in the constructor of an Actor subclass. The constructor is what creates the object -- it must be created before being added into any world. Usually, the act method is where collision checking should be done.

Internal or external counter (value shown on screen or hidden)? What have you tried? Show some attempted code. The "end game screen" can be either an actor object that is added at the end or a separate world. Which do you prefer and what have you tried?

You can do: <Code Omitted> Alternatively: <Code Omitted> However, from a design perspective it is better to use polymorphism (as danpost suggests). You don't need to check for "a" and "A"; they would be the same key.

There are multiple collision checking methods provided in the Actor class. I would start by using one of them. Check the greenfoot.Actor class API documentation to see what methods are available.

Alright gonna try it right away :) thx a lot :D

Great, thanks both of you!

WoW thank you very much

There are two places where you will need to check for touching a platform. After line 14. where you move vertically and after line 29, immediately after possibly moving horizontally left or right. You will need to use the value of 'gravity' to determine whether touching from above (when 'gravity' is less than zero) or from below (when 'gravity' is greater than zero).

When I change the name I get a lot of errors in the other classes.