The graphics are borrowed under a free license from the classic MS-DOS game Tyrian and are copyright © Daniel Cook. Coding and music was done by me. (One of the songs was made for the then in-development game Punch Club.)
I have updated the demos recently so that they can function with the latest version of HaxePunk.
Source code for the game, as well as sources for the demo games that led up to this shmup, can be found on Github.