In Colossus of Rhodes I found the purple key but it will not unlock the lock. I tried to refresh the game, but still will not work.
pixel_player93125779 These mines all belong together. The keys found can be used in one of the other mines. So you can only finish each mine once you have done other mines. You can see in this picture where the keys can be used.
pixel_player93125779 The keys have clues written on them. Read them from your inventory.
Roeland The purple key doesn't show in my inventory. But I see it in the diagram above that you posted. Thanks!
Did you look in inventory/materials/filter/miscellaneous?