Azi's Simple Tic Tac Toe

This is, yes, another clone of the ancient Tic Tac Toe thing, your wits against your beloved gadget. Four levels of difficulty, from the almost-random to the invincible. This was written at the request of my little kiddy, hence the design is simple and plain as can be; No bells, no whistles, no 3D rotating baroque textured noughts and crosses (are you nutz??), just quick TTT battles with no interruptions, no ads, no nothing! Anything this spartan (apologies to my Greek friends from Soundclick) should be cash-free and ad-free, and it is. Enjoy your fingerprints off.