Beta is finally liberated. You can download it from:
- 6 different languages;
- Music (Kevin MacLeod, from incompetech.com);
- Sound effects (freesound.org);
- Better ship handling;
- One more training mission: exercise;
- Better visual effects.
The game is licensed under the GNU General Public License, V3 (https://www.gnu.org/licenses/gpl-3.0.en.html)
The source files can be found in section “files”, in the IndieDB page.
I’ll find a time to publish a better description and development details later.