> he is only using the first (blue) tile
That's what I assumed too, but I didn't want to be sure of it because one have to be too stupid to do a demo of a product using always the same part. "Look I designed a keyboard and I can type with it: 'aaaaaaaaaaa'".
Okay, so it means that if I want to type 'n' I hit the 3rd tile and then I have to move four tiles away. Except I can't. So I guess I'll have to go backward when I reach the last tile in the direction I chose. But that seem to conflict with what I inferred for numbers…
The numbers I'm not sure. I think it is the same concept with 1-4 on the first tile (blue) and other numbers on other tiles.
Still doesn't seem like it would be faster for typing.
Blue (1st) tile is EABCD, Green (2nd) is FIGHJ, Yellow (3rd) is KLONM, Orange (4th) is PQRTS, and Red (5th) is VWXY.