Ah, I see. Try tweening the global position to -2 on the Y instead (just remember you can’t tween the global position directly and have to use the update callback: see this reply: [SOLVED] Tweening to World Coordinates Instead of Local Coordinates - #9 by mcmorry)
The global position for elements are normalised between -1 and 1 for the min and max bounds of the screen. A global position of -1, -1 would be bottom left (or top left, I can’t remember which direction the Y axis is in)
See this thread for more details: 2D image follows 3D object - #3 by yaustar