New Features
Label Function: Use the shortcut Alt + [Number Key] to save the current puzzle state to the corresponding slot, and [Number Key] to load the puzzle state from that slot.
Operation Improvements
Added WASD keys for map movement, and slightly increased movement speed and acceleration.
Slightly adjusted the position of the triangle marker.
Marker operations are now consistent during dragging.
Other Changes
Added simple descriptions for different difficulty modes.
Adjusted some tutorial stages.
Adjusted the positions of several levels.