Thanks for your comment! To be honest you were lucky, the AI is very simple and mostly random at the moment, it doesn' t rely on it's current situation to take decisions, just weighted probabilities. It's definitely something I will have to look into in the near future. As for different weapons, that's in the works too, in fact I already have a knife implemented, but as I did it after the deadline it's not available at the moment.
You're definitely right with the music, I fell into the trap of leaving sound for the end and I didn't have enough time to find a good soundtrack. I'll make sure to correct that next time I update the game!