Salsabila, R. et al. 2026. Immersive TOEFL Preparation in the Metaverse: Usability and Navigability of a Roblox-Based Game Developed via GDLC. Journal of Informatics and Vocational Education. 9, 2 (Jul. 2026), 67–83. DOI:https://doi.org/10.20961/joive.v9i2.3520.