Games like Simple 1500 Series Vol. 100: The Uchuu Hikoushi

If you finished Simple 1500 Series Vol. 100: The Uchuu Hikoushi, the closest matches are Deathgarden: Bloodharvest, Goat of Duty, Lordz.io, Synthalaxy and Project Lazarus. All 7 share its adventure genre and are ranked by how closely their themes and modes overlap.