Tic-Tac-Toe

This is a 2-player local game, or you can play against the AI by selecting a difficulty above.
X always goes first.
Click or tap an empty cell to place your mark.
On a 3×3 board, get 3 in a row to win.
On 4×4 and 5×5 boards, get 4 in a row (horizontally, vertically, or diagonally) to win!
The score tracks your wins, losses, and draws across rounds.