The story, the plot and the characters. If you want the user to get through the game to the end, you need an interesting story.
The developers Write it together with you, discussing everything from the location to the color of the hero's hair.
Category and genre. For example, you can make a single-player minigame or an online multiplayer strategy game.
Operating system. When developing mobile and computer games we use the Unity engine. It supports 25 different platforms, including personal computers, game consoles, smartphones, etc. Allows to work on devices with Microsoft Windows, Android, iOS, etc.