It is a well written, well designed game. I can say I was touched by the story and enjoyed the clever way it was implemented with the shrinking mechanic. However, I'm not so ready with my praises.
The game falls under the same category as Braid and Dys4ia, in that it does not give the player a chance to easily experience the emotions of the story for themselves. Instead, the story is spoonfed to them through narration. The player has to either personally relate with the story or have a strong sense of empathy to really be affected by the story. It is arguably more important for the game mechanics to reflect or inspire the emotions that the plot intends to evoke, and I just don't really feel like this game did it too well. The final puzzle and confrontation was the worst case of this. The gameplay during that level was just jarring and didn't mesh with the powerful themes that the game was throwing at me while I played through it.
It is possible to have your game tell a story through gameplay instead of words (Limbo didn't need words, did it?), and I feel that is often more effective. There can be a balance between the two (The Company of Myself did this well, especially in one moment), where the gameplay fully reflects the narration, and I see a bit of it here. But it's done a little ham-handedly most of the time, such as Hans stomping on his own "ugliness", and the other times the puzzles don't really correspond to the story.
Let me reiterate, I enjoyed this game. The puzzles are well designed, the writing is clever and humorous at the right times, and I genuinely liked the story. But the the narration is so present and the game so linear, that I feel this leans a more towards interactive story than an actual game.
I hope my review doesn't offend, and I hope you continue making games in the future! :)