Press the flag. (Full screen is recommended.) Press Space to go to the settings (it can be a bit slow sometimes). Touch the bubbles with the mouse-pointer to pop them. This project is just supposed to be relaxing. It's not a game. It's sort of an animation. Basically, you watch the screen.
I made it all in like half an hour. The music is Chill from the Sound Library, but I slowed it down.