New release is out. This is probably last big feature update. I now need to wrap up some release things - Steam integrations, content etc. 

Changelog 

Additions:

• Achievement system - In-game achievements are now available from the statistics menu
• Added control info screen in pause menu
• Improved ZEN mode piece picking algorithm 
• There is now a backup save being created

Fixes:

• Fixed a bug when going back to main menu while pieces are being spread
• Fixed bugs with puzzle completion checks
• Fixed bugs with save game popup from puzzle selection screen
• Fixed overplaying the hover sound in main menu
• Tweaked puzzle complete celebration a bit