Idea for anyone

I was just thinking about the game I am making for this week:
http://www.cplusplus.com/forum/lounge/147783/

The game is called Labyrinth, you tilt the board to make a marble go along a path while avoiding holes:
http://ecx.images-amazon.com/images/I/51-VrwnXWDL._SL500_AA300_.jpg

I'm going to make it top down, but it will be in 3d and have some shadows going.

Anyway, I thought it would be a real neat game to play on a tablet where you could tilt it instead of pressing arrow keys. Then I got to thinking about shadows.

So here's the idea: Tablets and phones have cameras on the screen side so you can take selfies easier, right? With some maths, it would be possible to figure out the most intense source of light in the room that you are playing in. I think it would be pretty cool ( instead of just real neat ) if the direction of the shadows in-game react to the direction of the light source in real life.

Anyway, just an idea that I thought someone who works/plays with handheld devises might be interested in.
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