Click on the green circle. Every time you click it, it's going to change its position and add 1 to the score. Your aim is to click on the green button, and not on the blue backdrop (or background). If you click on the backdrop, your game will end. Click the Green Flag to start the game again. Please comment to give feedback. Hope you have fun!
I saw this idea on the Ideas page of Scratch, but I made it on my own, without watching the Tutorial. The idea of when the game ends was mine too, and not copied from somewhere else.