Note that on linux need to set resolution before playing 1st time. To do this, hold the Alt key when starting the game. Set your resolution to the one closest to 900x600.
Note that you must have a jailbroken ipad/iphone. Here are some iOS screenshots though:)
I used a lot of art by other people. Thank you to all the artists who shared their work for free.
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
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/