Online game platform Roblox today said it is adding a new Build tool that will let iPhone and iPad users create games using AI. With the mobile-first Build option, Roblox users can write a text-based prompt and have AI turn it into a basic game. A single prompt will create a starting point that can be expanded with playtesting and further commands. The entire game-making process, from creation to uploading on the Roblox platform, can be done on a mobile device.