Switch games when you are stuck
If you are stuck, you can switch games. Leave the Sudoku under Continue. Open a Star Battle. Or take a Binary Puzzle or Killer Sudoku for a different kind of scan.
Stuck is not a failure. It is a board you cannot see through yet. A different grid can reset your eyes. The first puzzle will still be there on Home.
You can also stay and look again, or take a hint that explains a next step. Switching is one option, not a rule.
Four live games is enough to do this without hunting. Play the one that feels open. Come back to the one that does not.