I hated Reveal.js until I realized that I could press Space to advance, and Shift-Space to move backwards, and it will just Do The Right Thing. Can you go down

I hated Reveal.js until I realized that I could press Space to advance, and Shift-Space to move backwards, and it will just Do The Right Thing. Can you go down? Space will go down. Otherwise, Space will go to the right. It re-linearizes the presentation, while still preserving the 2D layout for quick navigation between major topics.