Gridlock Sudoku

Are you looking for a puzzle game with clear rules, smooth gameplay, and easy to learn? This number observation puzzle is your perfect choice! It has super simple operation, intuitive visual prompts, and zero threshold gameplay, suitable for novice players and casual game enthusiasts with puzzle experience.
The core gameplay couldn't be simpler. With just a gentle tap, you can select any blank grid cell and then choose the corresponding number from the keyboard to fill in the blank space. The game uses a scientific color discrimination system to help beginners quickly distinguish different types of numbers. All preset numbers at fixed levels are displayed in black, cannot be modified, and serve as the standard basis for solving puzzles. Meanwhile, every number you manually add will be displayed in blue.
The humanized error reminder function helps new players grow quickly. Entering an incorrect number will trigger a pale pink cell reminder, allowing you to immediately recognize the error, reconsider your judgment, and correct the mistake. There are no complex challenges, no difficult logical barriers, and no time constraints. You can freely practice your observations and numerical judgments. Start your puzzle journey with ease and enjoy the pure beginner friendly fun of brain games!