update

Author: vangj

python/pygame/README.md

@@ -1,8 +1,15 @@
 # Pygame
 
 Tutorials in [Pygame](https://www.pygame.org). The API documentation is [available](https://www.pygame.org/docs/). 
-All sound effects taken from [zapsplat](https://www.zapsplat.com/).
-All images take from [craftpix](https://craftpix.net/).
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+Images
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+* [Open Game Art](https://opengameart.org/)
+* [craftpix](https://craftpix.net/)
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+Audio
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+* [zapsplat](https://www.zapsplat.com/)
 
 # Basic