Thank you for your feedback and video walkthrough! I'm glad you enjoyed our little game! =)
Have you played the Windows version? The fact is that upon completion of all levels, an inscription should appear (at the bottom right). It is also a button for saving the resulting postcard in the form of a picture. But I didn’t see this inscription, it’s probably a mistake, sorry.
You went through the levels in a different way and it pleases, it turns out that you can go through the game in different ways. Physics works wonders, but sometimes it creates a lot of problems. =D