MiniMax M3.1 Flash ships a 3D neon runner in 46 minutes and self-tests a fall-through bug
Hands-on: one prompt yielded a playable single-file rain-soaked city runner in 46 minutes; self-playtesting found the runner falling through stacked rooftops after a few hundred meters, fixed with a 30,000-step check passing 96/96 with zero console errors.
I gave MiniMax Code one prompt: build a 3D neon rooftop runner. And chose M3.1 Flash model, Then I left it alone. 46 min later: a playable rain-soaked city. One HTML file, no build step. Then I said “make it more cinematic.” It reworked the lighting and the controls still worked.sunset that fades to night as you speed up, flickering neon signs, shield power-ups, slide barriers, combos, touch controls. Controls unchanged. Then I told it to playtest its own game. It found a bug I’d never have caught by playing for a minute. After a few hundred meters, rooftops stacked on each other and the runner fell through the floor with no gap. Its first tests missed it too, because they only ran short sessions. MiniMax Code with M3.1 Flash fixed the track logic and added a check across 30,000 steps. Final: 96/96 checks, zero console errors. It also told me what it couldn’t verify: real GPU frame rate, since its sandbox had no GPU. MiniMax Code’s daily check-in: 400 points/day, 1,000 on day 4 and 7, 4,000 for the full week. What would you build with an AI agent? Try MiniMax Code: http://agent.minimax.io/download