SEAMLESS BACKGROUND
https://screamingbrainstudios.itch.io/seamless-space-backgrounds * author: Screaming
Brain Studios * Adaption: clipped to fit canvas
ASTEROIDS https://www.pngegg.com/en/png-nzbum * author:
unknown * Adaption: second (darker) set of rocks
PLAYER SPACESHIP
https://opengameart.org/content/animated-fighter-spaceship * author's blog =>
http://millionthvector.blogspot.de * Adaption: resized, made into a spritesheet
PLAYER SPACESHIP EXHAUST
https://opengameart.org/content/explosion-effects-and-more * author: Soluna
Software * Adaption: turned 180deg to simulate exhaust
ENEMY SPACESHIPS
https://opengameart.org/content/animated-red-ship * author's blog =>
http://millionthvector.blogspot.de * Adaption: recolored, made into a spritesheet
PLAYER SHIELD AURA https://www.pngwing.com/en/free-png-zwjru *
author: unknown * Adaption: none
POWER UPS
https://opengameart.org/content/rotating-gems-for-match3 * author: Bondoki *
Adaption: recolored, made into new spritesheet
USER INTERFACE
https://opengameart.org/content/space-shooter-game-user-interface * author:
CraftPix.net * Adaption: resized elements
FONT #1 https://www.fontspace.com/space-mission-font-f56190 *
author: Maknastudio * Adaption: none
FONT #2 link: https://www.fontspace.com/snes-font-f26537 *
author: Lyric Type * Adaption: none
EXPLOSIONS
https://opengameart.org/content/2d-explosion-animations-frame-by-frame *
https://opengameart.org/content/2d-explosion-animations-2-frame-by-frame * author:
Sinestesia * Adaption: none
RAZOR ANIMATION https://opengameart.org/content/razor * author:
Modanung * Adaption: recolored
PROJECTILES
https://opengameart.org/content/assets-free-laser-bullets-pack-2020 * author:
Wenrexa * Adaption: nothing
MUSIC https://opengameart.org/content/5-chiptunes-action *
author: SubspaceAudio * Adaption: nothing
MENU SOUND
https://opengameart.org/content/menu-selection-click * author: NenadSimic *
Adaption: none