This version has numerous changes and bug fixes from 3.0.3, though it's not a huge update, older save files aren't compatible:
Nyx's mode has a new dungeon that can be accessed after the first one.
The Sky Garden Temple has been redesigned.
Nyx's portion of the overworld is bigger and rearranged in some spots.
Sasha's dungeons have changes to certain rooms.
Grab system is different, instead of mashing to escape you only have to hold down the jump key. However there is a variable time limit to how long you have to escape. You have the option to attack enemies for a large amount of SP to immediately escape, but it can fail under some conditions. Many enemies also can't continuously grab the player as easily as older versions.
Some new items added.
A couple new enemies added.
Game should run better and not be as likely to crash when closing.
Special art is displayed depending on the results when finishing the demo.
As with version 3.0.0 this version will only be available for patrons for a certain amount of time, and I do realize I wasn't able post anything in February, I'll try to make up for it later if I can.
*Updated to 3.1.1 as there were some important issues I missed.
Area name text scrolling infinitely in Hoarder's Passage.
Wyrm fireball freezing player on ladder.
Room in Forest Sanctuary showing clear when a chest is unopened.
Blue switches updated on map in Ship Graveyard.
Issue displaying jump key prompt if rebinded in options.
Chest count in Sasha's mode fixed, though one chest in Sasha's mode is bugged and can open early if a lever near a savepoint is activated.