You can now unlock all tiles and restart the puzzle by holding the reset button for 1.5 seconds
Fixed an issue with hints on Puzzle G11
Fixed a rare issue with the undo function
Updated credits
Probably introduced new bugs that I don't know about yet
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Plans for the near future:
Add visual identifier for locked tiles
Achievements (I hear you, but please give me some time to learn Steam API)
Source: Steam Community (opens in a new tab)