無限漢字埋めパズル is a free puzzle game available on the Android platform. In this game, players are presented with a crossword puzzle grid with empty squares. The goal is to drag and drop the character panels from the bottom of the screen to fill in the squares and form words. Once all the squares are filled, the puzzle is cleared.

If a player enters an incorrect character, it will be highlighted in red to indicate the mistake. Additionally, tapping on the "?" button will provide hints for the words.

The game allows players to filter the displayed characters based on their knowledge level. They can choose to include characters learned in elementary school (grades 1-6), characters learned in junior high school (grades 1-3), difficult common use characters, or a combination of all.

Players can also select from six different puzzle sizes: 3x3, 4x4, 5x5, 6x6, 7x7, and 8x8 grids.

Please note that the puzzle creation process may take some time. Even if the app is closed by pressing the home button, the puzzle creation will continue. Once the puzzle is completed, a notification will be sent.

It is important to have an internet connection to access hints while playing the game.