Resetting all data in options : is this a viable way to get trader artifacts? are they cumulative between games? another tangeant question : Is there a fast way to scroll for the artifacts?

I have 86 gems. But whenever I click the little button below power ups on the respective level beginning screens, it does nothing. They just click and click and don't add keys, or gold, or what have you. So what's the point of currency if I can't use it?

How exactly can I buy an artifact? My progress says that I have 16/30 but I don't remember buying a single one.

So far I've managed to three star 117 levels, with only 113, 117 and 120 left. I maybe had to go back to three star 10 levels all up. I really like the difficulty curve of easy-medium, one hard one, then comes back down to easy to learn a new concept. It's refreshing not to have a puzzle game where you fight wall after wall of increasing difficulty....

I have lost progress two times already, first time, I had to start the game from the first level, second time I was rolled back to 5th. It seems like the progress only saved sometimes. Do you write save file after each victory, or only when user quits the game? Also, where exactly should the save file be stored? I was only able to find "c:\Users\MaxEd\AppData\LocalLow\Jetdogs Studios\Maze Lord\" folder, but it does not seem to contain a save file, only some statistics....