Thanks to Cotter for this. He says:
yo the first thing after you click "open"
THE FIRST THING THAT APPEARS IS THE MINI PONY ABOVE! AND YOU CAN BRUSH ITS MANE WITH YOUR MOUSE WOOOOO! FGDJSHDGHJ
The site itself is some greeting card to make you happy or something, and they couldn't have picked a better interactive image to kickstart the wave of joy.