If you want to get your mitts on an early version of Clover: A Curious Tale, and also the final version when it's ready, you can sign up for some testing over at Blitz Arcade's site. You need to be over 18 and you'll need to do some testing, but hey - no such thing as a free lunch, right?
Just been doing some playthroughs of the near-final A Curious Tale, and so far it's taking me three times longer to complete, and that's not including all the sub-quests. Or the epilogue. Or any of the four endings. Some of the new puzzles are a bit more lateral as well, so no doubt it'll take mere mortal even longer. Hurrah for value-for-money!