🔢 Sudoku Junior

📖 How to Play

1. Tap any empty square on the 4×4 grid to select it — its whole row, column and 2×2 box light up.
2. Tap one of the big number buttons 1, 2, 3 or 4 to fill the square.
3. The rule: every row, every column and every 2×2 box must contain 1, 2, 3 and 4 exactly once.
4. If you put a number in a spot that breaks the rule, it flashes red and wiggles — just try another number!
5. Stuck? Press 💡 Hint (you get 3 per game) to reveal one correct square with a sparkle.
6. Use 🧽 Erase to clear a square you filled. Press 🎲 New Puzzle any time for a fresh challenge.
7. Finish fast to earn 3 stars: 90 seconds or less gets 3 ★, under 3 minutes gets 2 ★, otherwise 1 ★!