Roblox is testing a tool that could accelerate the process of building and altering in-game objects by getting artificial intelligence to write the code.

From creating virtual experiences to selling tickets within games and social media, Hollywood is trying to capture the attention of young fans in places they frequent.

SAN FRANCISCO—At the Game Developers Conference Monday, Roblox rolled out a new set of AI tools designed to let the company's millions of player-creators create usable game code and in-game 2D ...