This game is really creative! I've always wanted to make a game where you change the code to progress but it seems you've beaten me to it. The simple art style is nice and the communication via .txt files is pretty cool. However, it's pretty short and there isn't that much to do in that short time (but the AI did say it was a demo so I guess it's ok) and when touching the move button it responds a little late.
Overall, cool game with an interesting concept.