If you haven't already seen this, then I suggest you have a play of 'Windosill' by Vectorpark. Windosill is a game where you have to guide the little toy train through the door on the right of the screen. The problem is the door is looked, and to unlock the door requires you to find the little cube in the scene and place it in the hole above the door.
The beautifully visuals are 3D but rendered in a very flat fashion which only adds to the charm of this game. On top of that, the animation and interactive bits are just wonderful. Go and have a play!
A 3D artist, animator, illustrator, and all-round creative chap. Working in the video game business for 15 years, Ed loves creating characters and making them move, writing stories, and lots of other arty type stuff.