Story: Adventures of Willy D. is point and click adventure type of game. If i would compare it's game play most similar would probably be "Broken Sword" but with adult content. Everything in game is animated so that means it is not type of graphic novel where you just see pictures or animations only in certain situations. Even when character just stands you may see his movement of breathing.
Do not use old saves from previous version of the game. And you do not need to repeat game from begin as I am creating saves for every version. Read how to use savegames and how to install em (all files are in savegames and walkthrough folder in links) and you will be able to go on with story from any version before.
First a fair warning about a small glitch: Don't use sweet memories with Sophie before you end the main story. It won't really break your game but it will make huge spoiler. After you are done with story it's safe to use it as you will know what happened anyway.
There is new main story based on path and general story... New collections new unlockables etc. Read walkthrough if you want spoilers. There was an update to Visionaire engine so some things like cursor stuck to only 1 part of screen should be resolved. Other minor bugs were removed as well.