Jhon Peruno focused on environment polish and map layout enhancements for the Sojourn-Iskhod repository, delivering a refined gameplay experience through detailed asset placement and level design. Using DM and leveraging skills in map editing, Jhon integrated new items such as power cells and machine frames, while adjusting room dimensions and adding shutters to improve flow and accessibility. The work included resolving graphical errors encountered during item integration, which stabilized visuals and reduced potential post-release issues. All changes were traceable via version control, supporting efficient QA verification and rollback. The depth of work reflects a methodical approach to environment and gameplay refinement.