"Skills" as in the Q button? Which button is the "skills" button?
And it's different from the main game, and Chilly's mod in a variety of ways - most notably, the Corruption path is highly different and varied, focusing more on the enslavement of the women and their reactions/scenes/dialogues as they progress, with multiple endings already in place, and the newest patch (the one that's breaking everything, apparently) has a new bit of +Corruption for Mrs. Jennings and the school as a whole.
Check out the Change-Log on the first page for updates and additional information.
And the links have been fixed / updated once more with the proper starting place. Hopefully that should make everything work as intended.
Figured out the problem with the school - I was re-working the tilesets, forgot to change something, so nobody could actually move. I think I've got it all working again, as I've played it myself, and couldn't find any reason for things to not work.
Same thing as before, download, unzip, drag files to DATA folder, replace the files, and you should be golden.