Just wanted to say how much I adore your game. It has become part of my morning routine now and often features in my nightly wind-down, too!
It is such a unique twist on a familiar puzzle style that (once you get to grips with the significance of the clue tab) serves up its own bite-sized (but oh so tasty!) take on makes minesweeper and Sudoku so appealing.
A game where due to the size of scale, the linchpin is often staring you right in the face, yet it can still be so challenging to find!
Hard has been a perfect level of challenge vs frustration thus far and I love that I am still learning more advanced techniques to employ to solve puzzles 60+ levels in.
Notes:
I think that I have finally reached a couple of levels * that have multiple solutions. It is awesome that both alternatives pass the level so you don't have to guess what the game wants you to input as the "real" answer!
* Level 62 and 75 on hard for those playing along at home.
Out of interest, my I ask why you opted for 2 circle looking shapes (circle and hex) rather than a square?