It's simple! Find the right button to move on to the next level! Hint: Turn your speakers up; they make a slight ticking noise when you put your cursor over them, and the right one makes a slightly different noise.
The image at the end I DID NOT MAKE AND DO NOT TAKE ANY CREDIT FOR IT! I found it here [link]
Yes I know this is REALLY corny! I was just bored in school today and couldnt think of anything else to do!