jordy, R. J., H. Marcos, J. Wijaya Kusuma, D. Intan Surya Saputra, and P. Purwadi. “Game Design Documents for Mobile Elementary School Mathematic Educative Games”. Journal of Soft Computing Exploration, vol. 4, no. 2, May 2023, doi:10.52465/joscex.v4i2.129.