Here's the changelog of versions v.1.02 and 1.03:
Russian localization added (many thanks to Anton Slidding)
The savegame is stored in the game's folder for users who don't use Steam Cloud and want to backup their progress
Updated the app runtime the game runs on
Fixed an interaction bug in the various pause screens (1.02b)
Fixed a minor visual issue in the gamepad settings screen (1.02b)
Enabled Steam Cloud saves (1.02c)
Improved puzzle grid scaling and rendering (1.02d)
Puzzles can now be zoomed in by pressing F5 (1.02e)
Improved puzzle grid scaling and zooming (1.02f)
Fixed launching issue on Windows7 (1.03)
Added category and puzzle titles on mouse over in Classic mode (1.03)
Fixed minor puzzle thumbnail generation issue introduced in 1.03 (1.03b)
Zoom status persists across puzzles (1.03c)If you find any issues let me know in the Community Hub!