Click the green flag and read the information. Then click the START button to go to the game screen. You see a CLUES button to toggle between the CLUES and the game screen. To play, click a pie segment sprite to change its face number. For a hint or to get the solution, click the cat.
The fine line vector grids (in the Backdrops library) open up the potential of Scratch for maths teaching, They have many uses, including help with the layout of games and puzzles like this one. The READY-STEADY-CODE fine line grids were donated to Scratch MIT Scratch by Seamus O'Neill