this is a really great twist on Minesweeper, better than mine!
A couple of things:
- there's not much to differentiate clues and un-clicked tiles - maybe the clue tiles should be darker or something?
- it can sometimes be hard to tell which layer is at the top or below etc. - maybe the "current top layer" coloured square in the bottom-right-hand corner should be a series of stripes to show the hierarchy of layers?