2D Help the greenhorn.

Hi, I started my adventure with unity and I don’t know nothing.
I try to do a game for two players.
I would like to make a active containers. When player 1 clicks on the container then the block of player 1 falls and begin the oponent turn. The same for player 2.

Could somebody tell me what I should use for this?

That’s a very generic and broad question, much like asking “how do I do a full game?”.
I would recommend you to watch the introduction videos first or just check out the tutorials: Unity Learn and, once you start working on the game, ask more specific questions.

What you want to do requires more than just “one thing” to achieve.