Your first game is going to be a Flappy Bird clone. While this might seem like a complicated task, it really can be broken down to a few easy scripts.
Flappy Bird is a great starting game. It has a clear objective, uses much of the Scratch functionality, is relatively simple to create, and you can use your imagination by drawing your own sprites, backgrounds, and pipes.
What kind of a game is Flappy Bird? It is a game where your goal is to keep on pressing a button to make a bird rise as it is constantly falling while navigating its way through the pipes of varying heights that are coming at it.
It can be broken down as follows: