Please, make it 12x12

[pinpox]

Is there any reason not to use 12 instead of 13 colums for the little squares?
Currently one single square occupies a new line. Since 144 is a square number, using 12 by 12 seems like the obvious choice here.

[jmstfv]

@pinpox it should be 12x12, but it breaks off on smaller screens. I'll look into it.