Other levels not popping up after you finish a level

i have been playing code combat for a bout a week now and im in the second world. i cant pass it because the other missions wont pop up or show up. i have just finished coincopia and after that no missions have been showing up. please help me.

You should be able to replay Coinucopia and get the next mission to show up, or you can use this link: http://codecombat.com/play/level/copper-meadows

i tried it but it still wouldnt work