Tried your game, and it's awesome. Except the part I can't shoot anything, either because it's hard to target, or actually see a dark enemy on the dark background The game is impossible to play without cheats, which I had to dig up from the source code. Other than that, this is very impressive.
Easy Game Scripting with Lua:
I know, dark enemy on dark bacground is evil, but I have the same problem with Roge Squadron , Wing Commander and Vega Strike. But painting starships in wright-green or electric-blue...
I know also that AI is bad, but it isn't unbeatable. You need a lot of practise, of course, but it's possible. I hope it will be better when I finish it.
 I've found it!
And here you have one with Ruben's 3D models: video 
BTW, if judges can't run my entry (SIGSEGV or that), I've found that it only hapens with the "release" version of Allegro, but using the "debugging" version of Allegro it is more stable. Unfortunately it's necessary to make a modification in one file of Allegro.pas (or use the latest SVN), and recompile with "-g -dDEBUGMODE".