How did you iterate on the game mechanics in the early stages of development? Was the original version of the game significantly different from the final released product?
Here's a video from about 2 weeks into the project (it was codenamed Fractured at that time):
https://www.youtube.com/watch?v=BeMt9UJIPS0
One key mechanic in the game now that isn't in this video is the auto-panning after the user makes a word
(there's a bunch of other stuff too, like the timing mechanism, size of tiles, size of game grid, etc.., but that's more gameplay rather than mechanics)