Try to mouse-over the red dots before they disappear. (You don't need to mouse-click them.) Some dots start smaller than others. If you touch a dot that starts really small you get bonus points and will hear a tone. Score as many points as you can before time runs out! The faster you can touch a dot the sooner you can get another dot, so you have more chances to score points before running out of time.
This project was developed without using any other project's code. Of course the idea of a Scratch whack-a-mole game is as old as it gets. I wanted to make a game that would be challenging but possible for Scratch beginners to make. No moles were harmed in the production of this game.