Nice take on Minesweeper. I was able to play through the whole game on medium without ever having to guess (that is, there was always enough information to reason out a safe tile), so I think the game works in that sense. That along with the nicely polished interactions was enough to make it a pretty fun experience.
As for matching the theme, I think if you had just elongated the hexagons a bit in one direction it would have done a lot for selling them as "scales."