The source written by Steven A Wilson is freely available for reuse as long as credit is given to the author and original place of publishing, as follows:
Original author: Steven A Wilson (Alex)
Originally published at: thechaosrift.com

This source uses SDL. SDL is covered under the terms of the LGPL license, covered in lgpl.txt.
SDL binaries (precompiled versions) and source are available from
http://www.libsdl.org/