I'm sorry to hear that. The truth is, although Construct takes the hard work out of programming, it does not hold your hand. That is, it attempts to make things easy without limiting you. The side effect is there are less automations than in, say, GameMaker... Creating Tetris in Construct means you have to perform a lot of the actions yourself - which is not difficult to learn, it just takes practice.
A good place to start would be looking at source code from other versions of Tetris
and learning how to replicate it in Construct.
Of course, if the GameMaker version suffices for your girl, I guess you're set then.
Good night, man. Hope to see you around.