explosion.ogg - http://rpg.hamsterrepublic.com/ohrrpgce/Free_Sound_Effects --> copyright geklrt!
laser.ogg - http://www.mediacollege.com/downloads/sound-effects/alien/ --> copyright geklrt!
music.wav - http://www.playonloop.com/2013-music-loops/savage-match/ --> copyright geklrt!
enemyLaser.wav - http://soundbible.com/tags-alien.html --> copyright geklrt!

motherShip.png - http://icons.iconseeker.com/png/128/transport/ufo.png (bearbeitet) --> copyright geklrt!
life.png - http://icons.iconarchive.com/icons/aha-soft/free-large-love/32/Heart-icon.png --> copyright geklrt!
enemySheet.png - http://www.veryicon.com/icon/png/Transport/Transport/UFO.png (bearbeitet) --> copyright geklrt!
spaceship.png - http://www.iconarchive.com/show/crystal-clear-icons-by-everaldo/App-launch-spaceship-icon.html (bearbeitet) --> copyright geklrt!
asteroid.png - http://icons.iconarchive.com/icons/everaldo/crystal-clear/64/App-asteroids-icon.png --> copyright geklrt!

Musik von Playonloop.com
Alienlaser soundbible.com, aufgenommen von Mike Koenig