Yes there's UI changes, too, but UX/UI is just too wordy...

Gameplay Changes

• Blazer sprites have been retouched - thanks velius (@Malicos)

• Search bars have been added to topic menus and clothes/hair/ACS selectors

• Responses to compliments are now randomized

• Changed Hangman's background and font

• Spaceroom idle now has smoother transitions between expressions

• Smoother blinking animations

• Pauses have been added between topics

• Changed the names of the transsexual ribbon to transgender

• The updater screen's progress bar should actually move now

• The updater screen's Quit/Restart buttons will actually quit/restart the game now

• Zoom no longer resets when returning Monika while the empty desk is visible. (Except in specific circumstances).

Topic Changes

Additions

• 1 new greeting
• 1 new mood
• 3 new songs
• 1 new short story
• monika_fav_chocolate
• monika_sophia
• monika_we

Changes

• expanded the "back from work" greeting

Spritepack Changes

Required Updates

• NES-style Bows (Retro Bows) - updated the names to "ribbon" since these are actually ribbons (Retro Ribbons). You do not need to regift these despite the name change.

Optional Updates

• Ribbons (by Anonymioo) - transsexual -> transgender rename
• Black and White Striped Pullover - bare shoulder exprop adjustment
• Green Dress - bare shoulder exprop adjustment
• Miku - bare shoulder exprop adjustment
• Pink Shirt - bare shoulder exprop adjustment
• Put on a Happy Face Shirt - bare shoulder exprop adjustment
• Shell Bikini - bare shoulder exprop adjustment
• Shoulderless Sweater - bare shoulder exprop adjustment
• Tank Top - bare shoulder exprop adjustment

Fixes

• typofixes

• fixed crash when loading backup Monika data

• fixed mouse position function (getMousePosRelative) returning bad values in full screen

• fixed window position function (getMASWindowPos) returning incorrect geometry in Windows

• fixed hotkeys + buttons being usable while switching backgrounds

• fixed general issues with the Import DDLC Save feature

• fixed issues when your birthday is Feb 29

• fixed the chess compliment not unlocking for users starting in v0.12.0+

• fixed scary stories force changing the background to spaceroom

• fixed crash when switching to full screen on Linux

• fixed the lines appearing in Monika's standing sprite

• fixed calendar appearing in the open door greeting

• fixed general issues with window reacts

• fixed Monika's eyes looking at your cursor relative to the wrong window

• fixed Hangman being barely readable in dark mode

• fixed the retro ribbons being called bows and not being seen as ribbons

API Changes

• MAJOR CHANGE - the spaceroom call no longer scene changes if we don't need to. Please make sure you actually need a scene change (and not a BG change) when using the scene_change param here. See #7036 for more info.
• MAJOR CHANGE - the idle displayable has been modified significantly - see #6986
• Spritecode-image mapping now happens in a separate JSON (mod_assets/sprite_map.json)
• new MASGreetingRule param - forced_exp - can be used to force the initial expression when rendering the spaceroom
• our custom show_display_say function is now prepared for Renpy 7.
• conditionals in events are now compiled into bytecode on startup - the game will now crash on start if a conditional is bad
• new return key pause: x for tuning the pause between this topic and the next - see #6715

Spritepack exprop changes

• required-hair-prop and required-clothes-prop can now accept a list of strings - aka, ACS and hair can require multiple exprops
• bare-right-shoulder - actually means a bare right shoulder now instead of just compatibility with the downtiedstrand hair
• bare-left-shoulder - same as bare-right-shoulder for the left shoulder
• bare-shoulders - covers both bare-right-shoulder and bare-left-shoulder
• compat-downtiedstrand - used to signal compatibility with the downtiedstrand hair

If you have a spritepack with a bare (aka skin) shoulder, you should update your spritepack with the appropraite bare-x-shoulder exprops in the future