You're welcome!
Well it's different, this is an RPGM game so it means that you need to complete all the quests in order to proceed, it's a very linear game so you really need to complete everything that's requested.
Also regarding the girls you can't pick you preferred ones, you are forced to get all of them that is a big difference as compared to a Renpy game.
The game is big because there's a lot of content, not only the sex scenes ( that are absolutely wonderful, with lots of different position and the girls are all hot as hell) but the story require you to complete different tasks ( that will involve lot's of sex too).
The story is good, don't expect a masterpiec but it's well written and it's good 'til the end, try to imagine a mix between The goonies, Indiana Jones and Pirates of the caribbean, with a lot of humor, it become a little bit messy toward the end, but nothing bad, and it's quite enjoyable as I said.