My Italian is pretty limited to general meet and great 
Building it from scratch is extremely time consuming so just going to give you a real top level quick and dirty example using coronas built in widgets and some quick techniques to get you on the right track.
Using the scroll view widget in combination with bezier lines with a fill on them to produce the strip on the map we can achieve this pretty quickly.
First look at this tutorial, the trick is to use the below technique and then save the points so you can just draw it on the fly later instead of loading up a line as an image.
http://coronalabs.com/blog/2014/09/09/tutorial-working-with-curved-paths/
Then build a data file something like below, you could also put in stuff like the key/pointer to the image name or sheet index etc.
local levels = { {level = 1, x = 100, y = 100}, }
Then just draw everything into the scroll view in reverse so level 1 is at the very bottom.
Then set scrollview scroll = players current level.
That is the 50ft level I guess lol