Newb Help - 2D Game

Hi all! Hope you are well!

I am very new in Unity and have a question as to how I should go about getting this to work.

I am wanting 2D game objects to randomly appear, in a predefined static location as opposed to any random location, on the screen and scroll downward along the y-axis. During this time the user has to grab the objects and drag them to the correct location that they are supposed to go, i.e. "green ball" goes to "green box", before the object leaves the screen so that they can gain a point. How would I go about doing this?

Much thanks in advance!

 

SORRY, JUST REALIZED I SHOULDN'T HAVE POSTED THIS HERE, ALREADY MADE A NEW THREAD IN PROPER FORUM, YOU CAN DELETE THIS!