First game I developd in Unity3D from scratch.
Well it is pretty much oversimplified. No assets, no own designs, meshes or textures. Only build-in planes, cubes, physics and colors.
And it was funny to see how easy you are able to create games like this. Took just a few minutes to implement the logic to create the Grid and the Blocks and let them fall down in a funny way. But it isn't much more yet ;)