Round and Round Inc. One door, all of humanity

The economy here is simple and honest: people walk in, you charge them admission, and the money buys a better door. That is the whole business plan, and it escalates beautifully. Admission fees, group admission, promotions, door expansion, blade replacement: every upgrade is visible, so the little corner shop door you started with slowly outgrows the department store, then the headquarters tower, then the city itself. You decide what to buy and when, and each purchase changes what walks through next. Profit is the score, and the customers keep coming, one revolution at a time.

You spin the door by drawing circles with the mouse, and the force of your hand builds up in a flywheel. Or you stop drawing and leave it to the automatic drive, with gears and promotion doing the work while you plan the next upgrade. Both feel good in their own way: hand-spinning gives you direct control over the pace, and the automatic drive turns the game into a calm background hum. It is an idler at heart, so nothing pressures you. Play in short bursts or let it run, at whatever pace suits the day.

The door's blades are the fun part. Straight blades give way to scoops, impellers, spirals and turbines, and each shape handles the crowd differently. Physics is on your side and against the customers: turn too hard and people go flying. Nobody minds. They get back up and rejoin the line, and if you fling several in a row you score a combo.