Ride a little two-car railcar across a shallow, glassy sea. The track runs just under the water, islands drift past, and small halts stand on the sea, each with a shelter, a bench and a vending machine. There is nowhere you have to be.

Pick a service in your notebook or on the cab's destination blind: 25 or 50 minutes of focus, or minutes of your own. The run between halts becomes your focus time and each halt becomes a break: the doors open, you can step out into the sea breeze, and the train waits for you. Every halt where you rest stamps your ride log.

• Focus 25: a 5-minute break, and a 15-minute long break after every fourth run. Focus 50: a 10-minute break. Custom: 5 to 120 minutes of focus, 1 to 30 of rest.
  
• A bell rings as the break ends, and can ring again every 3 or 5 minutes if you like.
  
• Switch between 25, 50 and custom mid-run and the focus time so far carries on.
  
• Ten halts out on the sea, each with a stamp of its own.

• Sit by a window in the box seats, or at the desk with your notebook.
  
• Write today's to-dos in the Tab notebook and strike them through in pencil. They also show in a small card on screen.
  
• Tune the radio to Sea FM, Piano or Lo-fi. The track now playing shows for a moment in a card in the corner.
  
• Walk through the gangway door to the other car.
  
• Buy a warm drink from a halt's vending machine; it waits for you on the desk.
  
• Take the controls in the cab, or ring the bell overhead.
  
• Look in from outside: from the trackside, following the train, or from the sky.

Morning, midday, sunset and night, or let the sky follow your own clock; the halts' clocks show your time too. Clear days, cloudy days, and rainy days when the sea rises over the track, drops run down the glass and the wipers sweep the cab windows.

• No goals, no fail states, no rush.
  
• Every on-screen card can be switched off, dragged where you like from the notebook's Arrange UI, or hidden all at once with one key.
  
• Make the window small and it stays on top, riding along beside your work.
  
• Rebind the keys, and set the UI size, field of view, camera sway and graphics quality.
  
• Korean, English, Japanese and Simplified Chinese, down to the signs and posters in the world.
  
• 17 Steam achievements, all earned simply by riding.