"Yet Another Space Shooter" is composed of several people's work.
All programming was done by Andrew Davis. The git repository is at https://github.com/andyjdavis/yet-another-space-shooter.git See the file main.py for software license information.
All artwork is provided by Kim Lathrop.
The rocket booster sound is "engine-sound" from http://opengameart.org/content/engine-sound
All other sound effects are provided by Kenney Vleugels (http://www.kenney.nl) They can be downloaded from http://opengameart.org/content/63-digital-sound-effects-lasers-phasers-space-etc
The music is "Zone X" and is provided by mistnmc (http://mistnmc.newgrounds.com/) You can download the song at http://www.newgrounds.com/audio/listen/516494