I realized this super late..

If you press rotate on the first drawing, the puzzle rotates... Preview is difficult on the second drawing, and it only appears on confusing drawings where the pattern repeats. The third drawing separates the mixed puzzle pieces into edge pieces and mixed pieces.. I didn't realize the preview until after level 10... And I didn't figure out the other two until after level 15... I struggled so much ㅠㅡㅠ😭😭😭😭😭😭