A very simple 2D drag and drop game

I am trying to develop a very simple mobile math game for kinder garden kids, where they would be asked a question and can then drag and drop the answer. No moving objects, no physics, nothing.
My only requirements are:

  1. Create multiple levels.
  2. Have a scoring system.
  3. Give stars as rewards on correct answer.
  4. Be able to go back to a level if they want to play again.

I have been searching through several tutorials, and they all seem to address advanced topics. If someone could point me to a tutorial in this direction, it would be great.

Or is Unity not the right game engine to develop such games?

But look at Asset Store if there is something already done for you

You can make your game very easy on the “Storyline 2” app