New shuffle algorithms - fully solvable guarantees are now an option for casual play
Difficulty presets - easily set your challenge level
Steam rich presence - now your friends can see what puzzle you're playing
Tile spacing option - new option to add or remove the "tile gap" to make tiles easier to see
Improved loading - no more loading spinners (except for community puzzles) and smooth transitions between menus and realms
Auto-updating community puzzles list - when you subscribe to a community puzzle from the Steam Overlay, your list of community puzzles will automatically refresh when it downloads
Responsive UI - playing in a smaller window is now much more feasible, and so is editing puzzles
Editor help text - the editor has had some undocumented keyboard shortcuts that are now surfaced at the bottom of the screen for the active tool
Updated settings menu - visual aids and explainer text help you know what you're changing
Startup video - don't worry, it's skippable and can be disabled in the settings, but it makes me feel more professional