On the Subject of Rullo

Easy as 1 2 3...
or is it 3 3 3?

This module consists of a 6×6 grid of magenta buttons, each labelled with a number from 1–9.

Each of the twelve screens display a number, the sums of the digits in the corresponding rows and columns must be equal to the displayed number.
To do this, turn off the buttons whose digits do not contribute to the displayed totals.

Pressing a button will toggle it between its on and off states.
Initially, every button is in the on state.

Holding a button until a sound is heard will flag the button.
The state of a flagged button cannot be changed until it is unflagged by holding it down again.

Once the grid is configured, press the large magenta button to submit it.
If any rows or columns of digits do not add up to the number shown on its corresponding display, the border around that display will turn red.

Interactive Controls

• In Read mode, you can press [1]-[9] / Space on your keyboard or click individual squares to input the puzzle grid. Enter the display digits into the text boxes.
• In Solve mode, the grid behaves like the module. Click a circle to switch it off. Right-click a circle to mark it as known.
• The sound effects can be muted.
• Press the Manual button to switch into Generated mode where you can have fun solving generated puzzles.
• The solution you came up with in Solve mode as well as the solution to generated puzzles can be shown or hidden.
  
• Using the other buttons, you can switch all cells back to, reset the marked cells, reset the save the current state of the grid, delete the saves, or reset everything.
• On mobile, you can use switch from On/Off mode to Marking mode to mark cells.