Having trouble starting game...

My apologies if this is a really stupid question, but I can't get anywhere in this game.

What happens is that I open it and it takes me to this weird screen. If I move the mouse around it sorta moves the screen in that direction. Unfortunately, I can't DO anything at all in this screen, and have absolutely no idea what the heck I should be doing. Is this a bug, or am I missing something important?

Click the thing that says "Garden".