Wow, an amazing entry !
I really enjoyed the mood and the level of polish of your game. It was a really smooth experience even if, as others already told, the first tangram is quite hard.
The mix between puzzle and visual novel makes the story go really smoothly, and I really liked the little pics at the end of each levels, really nice details here.
The music is well fit for the game without being bothersome even when playing for a long time (yes I'm really bad at puzzle games haha).
Overral a really great shot, Congrats !