Press the green flag. Press space to see the next slide. When you get to the page with snowflakes, stay away from them as long as you can. When you lose all 100 points, you will see the next slide. (You can press space to skip the game if you want to though.)
Happy New Decade everyone! Welcome to 2020! *If the score gets to zero, you may not be able to go to the next slide after the "Happy New Decade!" one. Good news: there is no next slide. It just starts over! Bad news: it's a bug. But it's okay! No big problem here.