Monument Valley Thread

Hi!I have just played game "Monument Valley" (http://www.monumentvalleygame.com/) and wanted to ask you guys for opinions about the game. I personally liked it a lot, especially the visuals and the plot. Perspective tricks are great too. I could not resist and I had to try to write something similar in Unity (see screenshots below). Now I started to think about ideas that could make Monumenu Valley even better game. This could be just more complex levels but maybe introducing some mechanisms like teleports, physics, keys and doors would make the game more interesting. What do you guys think? If you played the game what were you missing?

If you have some brilliant ideas we can exchange private messages.

Thanks and bye,
Wodzuu