App inventor 2 how to (is it possible?) To know the x, y position of the moving sprite Heading
there are properties to get the X and Y position, see also Drawing and Animation
X
The horizontal coordinate of the left edge of the ImageSprite, increasing as the ImageSprite moves right.
Y
The vertical coordinate of the top edge of the ImageSprite, increasing as the ImageSprite moves down.
you might want to elaborate, what exactly you are trying to do...
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.