Full changelist (although in fact, almost the entire game was remake):

Graphic changes:
- Game graphics have been completely updated
- Completely redesigned character animations
- Updated characters and their styles
- Some minor characters have been changed
- Updated decorations on levels
- Added animations to some objects
- Fixed and improved lighting in levels
- Updated textures in the main menu
- Added shadows and improved graphics in the main menu
- Updated interface, buttons and character icons
- Updated game intro
- Fixed graphic errors

Sound changes:
- Completely updated music in levels and menus
- Added new soundtracks
- Replaced the sound of taking damage
- Fixed bugs related to music
- Replaced the music in the Easter egg game

Gameplay changes:
- Changed the angle and range of the character's camera
- Updated easter egg game
- Now instead of character classes their names are displayed
- Updated campaign completion screen
- Added new Easter eggs
- Removed squat animation
- Removed campaign "Halloween Quest"
- Removed character "Skeleton"
- Achievements for the "Halloween Quest" campaign have been removed.
- Fixed some bugs

Changes to the game in the Steam store:
- Updated all icons, images and logos of the game
- Updated icons and names of achievements
- Updated trailer and screenshots of the game

It was a long journey, but I got it done and brought you this legendary update!
Thank you for still supporting the game :)