Because I clearly do not have enough work to complete over the course of the day, I started this. I'm hooked. I'm supposed to leave here to go home in half an hour, but I think I might try to get past level five.
ETA: I got to level 6 an am now stuck. I can't find the numbers to save my life!
Read the URL, it's basically telling you what to do. Also, the maker of the game is German so...that'll help you a bit too. Lol, hope that's not too vague.