Art used in examples is provided under a free and permissive license.
Check individual licenses for details:

 - [Jupiter Crash] font by Brian Kent (AEnigma) - https://www.dafont.com/es/jupiter-crash.font
 - [Kaiserzeit Gotisch] font by Dieter Steffmann - https://www.dafont.com/es/kaiserzeit-gotisch.font
 - [Scarfy spritesheet](scarfy.png) by [Eiden Marsal](https://www.artstation.com/artist/marshall_z), licensed as [Creative Commons Attribution-NonCommercial 3.0](https://creativecommons.org/licenses/by-nc/3.0/legalcode)
 - [Fudesumi image](fudesumi.png) by [Eiden Marsal](https://www.artstation.com/artist/marshall_z), licensed as [Creative Commons Attribution-NonCommercial 3.0](https://creativecommons.org/licenses/by-nc/3.0/legalcode)
 - [Cyberpunk Street Environment](https://ansimuz.itch.io/cyberpunk-street-environment) by Luis Zuno ([@ansimuz](https://twitter.com/ansimuz)), licensed as [CC-BY-3.0](http://creativecommons.org/licenses/by/3.0/)