I asked Grok for help, and it jumped in with a plan—HTML, CSS, and JavaScript, using a canvas for graphics. In no time, it gave me code for a simple game, which I copied and pasted into my ...

The startup, backed by $10 million in seed funding led by a16z, offers a browser-based tool for designing 3D spaces — or “rooms” — using drag-and-drop, editable objects or code ...