Usually I would put a text guide to explain achievement but because the top guide is such a good guide I don't think there is anything to add to it. I have made a video guide for all of the different levels and again credit to the top guide as they have helped me with one or two levels.
level 2: 0:05
level 3: 1:29
level 4: 4:30
level 5: 6:00
level 6: 7:10
level 7: 9:00
level 8: 9:36
level 9: 10:07
level 10: 11:55
level 11: 12:36
level 12: 13:30