V2 with minor changes deployed

Still learning to crawl with Unity.  V2 is a very minor update, replacing the "Cube" train engine with a 2D train engine image (thanks, Dalle2!) Also tried to replace the "Level Complete!" image but made it worse since my revision didn't have a transparent background. Oh, well--minor. And I got rid of at least one debugging item that was visible by moving it to a layer lower than the scene canvas. 

Long list of enhancements needed but I may not be able to spend enough time to get good adequate at C# and Unity . . . My respect for those who do this well is huge!!!