Tap a numbered brick in your tray, then tap a highlighted cell to place it. Standard Sudoku rules apply β no repeats in a row, column or 3Γ3 box.
Complete a row, column or box and the brush sweeps it clean for points, opening up space to keep playing.
A column full-clear is extra special β it bursts into the four LUFTRA hearts for bonus flair.
Score enough points and you'll hit a level break: hearts rain down and the fence logo marks the milestone.
Game ends when none of your three bricks can be legally placed anywhere on the board. Keep the board open!