Seems you need some help ...
The layout size can be far much bigger than the window/screen size ... this feature is used in all scrolling games such as doodle jump. So you don't really create object in "negative" values pos but in pos out of window/screen "view" cause the "view" show only a small part of the total layout size.
After that you have to solve the scrolling problem ... seems in "doodle jump" the view is centered on "doodle" ... so put the layout in "unbounding scroll:yes" and use the "scroll to" behaviour and assign to the "doodle" object ... The best in to create your own scrolling system using a invisible object with "scroll to" behaviour and make this object changing position when you want the view follow the mouse/touch/sprite or be simply centered in the screen depending on context.
For some details about scrolling look at this sample project where the view follow the "touch" coordinates => Samplenaelian2012-05-10 20:52:17