All but two activated from when I played this before -- will have to reset the game to get the "finished" one and the "rare object" one, I think.
Actually, I got the finished quest without needing a reset.
Anyway, here's how the quests transfer from previous play based on what I got:
Immediate Transfer for Investing in the Future and Happy End: Going to the game page immediately transfers these quests if you met their conditions in previous play.
No Transfer for Deep Travel, Collector, Rich Digger, and Lucky Day: You must complete these quests again to receive credit.
Unknown Transfer for Mr. Gadget: I did not complete this quest in previous play, so someone else will have to check the transfer status of Mr. Gadget.
From scratch it only took about an hour to complete them all, not bad at all! This game reminded me a lot of utopian mining, just quicker and less tedious. Starting off is kind of annoying though since the days will end quickly with no upgrades, but after some drill and battery upgrades it starts to pick up.