This paper deals with the development of a computer game in the Godot game engine. A game called the Royal Game of Ur was chosen for development. This is a simple two-player game and is considered to be the oldest board game in the world. Usually this game is played on a board using two colored figurines. Four dice will be rolled to make a move. This game will be made in Godot engine and later on it will be exported as an application for Android mobile platform. Within this paper all the steps during the game creation process will be explained. First step in the game creation process will be to create the program code. Through this code all functionalities of the game will be defined. Then 3D models of board and figurines will be made within the Blender program. Furthermore, the models will be textured in ArmorPaint. Animations of moving the figurines will also be made in Godot. Sound effects and background music are going to be created in Audacity. Finally, user interface will be created and the icon for the mobile application will be created in InkScape. The primary goal of this paper is to examine the capabilities of the Godot engine during the mobile application development process. The secondary goal of this paper is to examine the quality of other free programs.