Interesting idea, but it was a UX nightmare. First thing I expected at least a subtle hint to use the arrow keys, instead of a click, spacebar or enter button

Interesting idea, but it was a UX nightmare. First thing I expected at least a subtle hint to use the arrow keys, instead of a click, spacebar or enter button to advance the slides. If I advanced past the first slide using the arrow keys, and then came back, I had to press the back button 5 times just to get back to HN.