A small D/GtkD example game

[mark]

I've just completed a small D/GtkD game.

It might be useful for others trying to learn GtkD since it is 
only just over 1000 lines, yet shows how to create a dialog-style 
app with a modal dialog and a modeless dialog, and a custom drawn 
widget, as well as keyboard and mouse handling.

The source (and a 64-bit Windows binary) is here:
https://github.com/mark-summerfield/gravitate-d

I'm posting to the Learn forum because I'm just a D beginner, so 
felt that using the announce list would be a bit presumptuous.