Ulysses is a copy of the Odyssey, Minecraft was a copy of Infiniminer, Stardew Valley copied Harvest Moon, Fortnite copied PUBG, film directors copy and spread each others’ techniques and storylines all the time. George Lucas even admits that Star Wars was heavily based on Kurosawa’s The Hidden Fortress, while Kurosawa’s film was derived from historical plays and John Ford’s westerns.