Code and visual assets created by me, using Notepad++, The GIMP, and Blender. The "Complex", "Grid", "Archplex", "Impact", "Cross-section", "Gold", "Sector X", and "Matrix" maps were created by Bobpoblo in Hammer. Sound assets are from the FreeSound project, edited with Audacity.
This game is almost entirely a one-man show (with the exception of Bobpoblo, who did some fantastic work on the maps!), developed completely in spare time. I started designing the concept during Christmas 2008, and development began in January 2009. Here's an early screenshot:
You can see more development screenshots in the complete screenshot album.
You can get the source, view the version logs, and more at the SourceForge project page.
In August 2009, I started a development blog. You can follow my progress over the last few months of fixing and polishing here: et1337.wordpress.com.
I also post some details of my work on my Twitter account. (follow me!)