I understand, that's why I'm here. But since most of the projects I've seen so far are based on games that already existed, I thought it was possible to start from an original arcade and modify it.
I see, most of the games have been built from the ground up, so all the sprite art you see (sprites available online or ripping from already existing games) has a bunch of programming behind it.
Thank you very much for the clarification. Regarding the video, I started yesterday to watch the guide of this channel, it explains everything very well. Best regards!