Animated Puzzles Star

For this achievement, you need to complete each puzzle in all 4 tiers at least once. You can play through them all on easy if you want to, but there are achievements that require you to play through on all 3 difficulties and with multiple different piece shapes, so you can try to stack those if you want. This guide focuses on the steps playing on easy. Each tier is progressively more difficult, but playing on easy is not too bad.

Tier 1 - There are 4 puzzles in (easy difficulty is 24 pieces). I can do them each in about 1-2 minutes on easy. Complete all 4 to unlock

Tier 2 - There are 4 puzzles (easy difficulty is 35 pieces). I can do them each in about 2-4 minutes on easy.

Tier 3 - There are 4 puzzles (easy difficulty is 54 pieces). I can do them each in about 5-7 minutes on easy.

Tier 4 - There are 6 puzzles (easy difficulty is 96 pieces). I can do them each in about 8-12 minutes on easy.

Overall, you have 14 puzzles to do and you could probably do them all on easy in a couple hours if you're not rushing. Use the image in the bottom right corner to see what the full picture looks like. I used the regular square puzzle piece shape but you could use a different one to try to match the ends up if that helps you.

Mine isn't a guide but just an advice.

If you have completed all the puzzles and you have all the stars on the board but the achievement isn't unlocked it's because some puzzles aren't completed correctly.
You have to look through the individual leaderboards of each puzzles to find those in which your time isn't indicated.