Click: Uproot century-old steel tracks. Drag: Set them down so your commute’s more efficient. Click: Build a new station outside your favorite pizza place. Yes, the fate of New York City’s subway system—660.75 miles of track, 469 stations, 5.7 million weekly riders—is up to you. You can thank electrical engineer Jason Wright, creator of the new online game Brand New Subway, for the power trip. Starting from scratch or a template, you can mold the subway system into your own piece of transit heaven. But no one commuter should have all that power, which is why we asked some responsible grown-ups—as in, people who think about and design transit systems professionally—to give the game a go. Here’s how they’d make New York’s subway, already one of the world’s best, even better.