From the main menu, select Jigsaws Mode. You just need to assemble all 30 jigsaw puzzles, 5 in each of the 6 continent. Each jigsaw is only 24 pieces. These puzzles should take you about 2-3 minutes each and roughly 1-2 hours to complete them all. Remember, pressing will give you a hint.
Puzzle building hints from Amazon XD:
Dropping two connecting pieces next to each other almost guarantees they will connect without you having to figure it out.
So here's what you do. Pick up a piece, let it rotate properly, and then place in one of five piles. Top pieces go on top, bottom pieces go on bottom, left and right respectively, and the middle pieces (non borders) go in the middle. Once you have these piles (should be around a minute mark on a puzzle). Take whichever border you prefer, and start picking up and dropping pieces onto the pile. Move back and forth on the pieces depending on where the next piece should fit (if you have the whole left bottom of a border done, start dropping the border to the left of the bottom pieces).
Pretty soon you'll get the hang of it and understand how the game pieces the pieces together. Once you have the border done, just drop the border around the pile a few times and the puzzle should fill itself in. After a few tries you'll get the hang of it and it'll become second nature. Each puzzle should take you about 2-3 minutes.
If you feel like it, though it’s honestly a point of preference, you can stack all the pieces on top of each other and kind of move the bigger pieces onto the littler non-connected ones. If you find it easier this way, you'll probably shave 15 seconds off each time. Time is not a factor as far as the achievement it concerned, and it doesn't seem like much, but for this, it means the difference of about 10 minutes of your time!
For the square puzzles, this will be your only option (stacking them all on top of each other). Even though it sounds harder, square puzzles done this way will still only take about a minute 30-45 each.
If done correctly, with a total of five puzzles each for the six continents, and two sets of continents (jigsaw and square), you should be done with these in roughly 1 1/2 to 2 hours. Good luck!
LINK: How to Complete Each Jigsaw Puzzle in About 1 Minute 30 Seconds