Fixes:
- Puzzle pieces sometimes failed to snap into the correct position if the rotate button was pressed while moving them (thanks, Equestrian Wyvern).
- Issues with anti-aliasing on Macs with Intel processors (thanks, AJG236).
- Disabling in game input when the Steam overlay is active (thanks, Dave).

Added:
- Option to exit the game from within a level (thanks, r0ckarong).
- Confirmation dialog when exiting the game from within a level (thanks, r0ckarong).
- Confirmation dialog when resetting a level (thanks, maximussolini and r0ckarong).
- Information screen after completing all levels (thanks, Just 4 Fun).