http://en.wikipedia.org/wiki/Delta_%28letter%29

The way I understand it is that it's the rate of change of a number.

Is there a delta function?

Thanks man.

And yes a message box would probably be a good idea. I didn't even know the log tab was an error reporter until you mentioned that.

The screen size should change after pressing the start game button but it unfortunately does not. Any ideas as to what I'm doing wrong?

Here's the cap file.