Game Rules:

1. Rule 1: Your primary objective is to leave no square empty, filling every designated space within the puzzle board using the colored blocks provided.
2. Rule 2: To maneuver, click and drag a block to trace a continuous line of color across adjacent, unoccupied squares.
3. Rule 3: Remember, movement is strictly horizontal or vertical; diagonal paths are not permitted, nor can you overlap existing lines.
4. Rule 4: The beauty of this puzzle lies in its flexibility. Feel free to initiate your line from any starting block and reverse your moves as needed without any fear of penalties.
5. Rule 5: Success in each level hinges on completely covering the grid, progressing through hundreds of increasingly complex spatial challenges.
6. Rule 6: There's no pressure here; take your time to visualize the complete picture before committing to your final moves, ensuring a satisfying puzzle-solving experience.

Controls:

1. Extend Line: Click, hold, and drag your mouse (or tap and swipe on mobile) to expand a color block into a line.
2. Reverse Move: Utilize the 'Undo' button or the keyboard shortcuts (Ctrl+Z or Cmd+Z) to retract your most recent action.
3. Reset Board: Click the 'Restart' icon if you find yourself stuck and wish to begin the current level from scratch.
4. Navigate Levels: Use the on-screen arrows to move between completed and upcoming puzzles seamlessly.

FAQ:

1. Q: Will I be penalized for taking too long?

Absolutely not. Lines to Fill is designed to be a stress-free experience, allowing you to ponder your strategy for as long as you need.

2. Q: Is this game restricted to desktop computers?

No, the drag-and-drop mechanics translate perfectly to mobile devices, offering a seamless puzzle-solving experience on the go.

3. Q: Does the difficulty scale as I advance?

Yes, while the early levels serve as an introduction, the complexity of the shapes and the number of colors increase significantly as you delve deeper into the hundreds of available puzzles.