A hybrid moving image role-playing game, Seema Mattu's Happy World Traveller? is set on the planet Youterus, a world through which visitors navigate as the narrative unfolds. On planet Youterus, Endogamy takes place - a campaign to decide the fate of Youterus: whether to preserve the hierarchy of caste which presently exists for the echelon race, or to abolish it.

Happy World Traveller? featured as part of Terrain.Art's post-fungible non-human exhibition, presented at the India Art Fair 2022.