My guess, now, is that it is a problem with the version of greenfoot you are using. You may want to shoot an email to support@greenfoot.org.

Try updating it again -- this time lock the scenario (check the 'Lock scenario' checkbox). Maybe that will fix the size of the world (possibly a bug when scenario is not locked).

The size of the world window is determined by the 'super' call in your world constructor. This one should be something like this: super(120, 400, 1);

@Nosson1459, I do not know what to tell you. Maybe its your browser; maybe it is something else. Sounds like the problem is at your end, however (but, I could be mistaken).

@Nosson1459, close and reopen your browser, log in and try again. I think if you refuse to run any scenario that no future ones will run on the same session.

@Nosson1459, sometimes the server is out. When you are logged in and it says "Please login to continue", just try again at a later time. (seems to be okay now)