PicOXO

Made in 557 chars of Pico-8 for the TweetTweetJam 4.

Tic-tac-toe. You know the rules. Try to align 3 blue squares or prevent the computer to align its red squares.

Use left arrow to move, X to play. Press ENTER and "Reset cart" to restart.

Made as a personal challenge after wondering for some time: "Would it be possible to make a human vs CPU Tic-Tac-Toe in 560 chars or less?". That's what happens after watching Wargames too much.