Attributions:
Audio for music and sound effects:
- http://freesound.org/people/toiletrolltube/sounds/182924/
- http://freesound.org/people/Halleck/sounds/19487/
- http://freesound.org/people/Syna-Max/sounds/64940/
- http://freesound.org/people/18hiltc/sounds/186943/
- http://freesound.org/people/Tuudurt/sounds/275104/
- http://freesound.org/people/Kastenfrosch/sounds/113989/
- http://freesound.org/people/Kastenfrosch/sounds/162457/
- http://freesound.org/people/lostchocolatelab/sounds/1470/
- http://freesound.org/people/frankum/sounds/320498/
- http://freesound.org/people/frankum/sounds/324880/
- http://freesound.org/people/frankum/sounds/333799/
- http://freesound.org/people/frankum/sounds/344494/
- http://freesound.org/people/frankum/sounds/346193/
- http://freesound.org/people/frankum/sounds/171284/
- http://freesound.org/people/frankum/sounds/317364/
- http://freesound.org/people/frankum/sounds/208519/
- http://freesound.org/people/frankum/sounds/171291/
Image art:
- http://tsgk.captainn.net/index.php?p=sheetinfo&t=2228
- http://hubblesite.org/newscenter/archive/releases/2012/37/image/
- https://commons.wikimedia.org/wiki/File:NGC_5139_Hubble_WFC3.jpg
- http://opengameart.org/content/texture-nebulas
- http://opengameart.org/content/plasmaball
- http://opengameart.org/content/lightning-animation
- http://opengameart.org/content/sci-fi-space-simple-bullets
- http://opengameart.org/content/wgstudio-explosion-animation
- http://opengameart.org/content/explosion
- http://opengameart.org/content/simple-explosion-bleeds-game-art
Links to binaries for different OS: