You can find the official 'Made for OpenGameArt.org's Late Fall Game Jam 2021' splash screens in SMS, NES, DB16 and DB32 palettes over at:
https://opengameart.org/content/oga-late-fall-2021-game-jam-logo
Display this splash screen as your game loads or starts to let folks know you made it specifically for OGA's Late Fall Game Jam 2021.
As an added bonus, credit it correctly and the splash screen will count towards your entry's 6 required OGA assets.