The instructions are also at the start of the game. You have to pause the shapes in their outline. When they're in their box, click on the shape. This game is super-fast, it works in less then a second.
I saw a video in which you had to play/pause to make the picture go in the box. I thought I could make it too. So, this is what it looks like. If you like it, give it a like and favorite it.