As expected there are some issues with the release of 1.2.0

Some known issues include

Luce's route doesn't seem to properly continue if you picked her sister
Fast Travel can get caught in a loop with Cleo and Luce
Isha's sisters don't show up with no explanation

If you have difficulty reaching demon sword content, that is probably because you missed the demon sword, or rejected the sword's offer back in Magna's storyline.

The problems listed above are being worked on, and should be fixed by this weekend. The patch should not require a full download, but I will upload a fully updated version of the game, along with a .Zip patch file for users with 1.2.0 already. It should extract, and replace files in your game folder, and your 1.2.0 version game will be updated just fine to 1.2.1
This patch will NOT work for versions 1.1.0 or lower. For those I recommend a download. Maybe using the Itch App!

I'll have an updated Guide released around that time too, which will help people navigate the game, as it can be quite large, and there is a bit of content.