Ah...
I really loved this game. Loved the art style, atmosphere, quirky nature of it.
However, I got stuck on the code. Ended up sitting with pen and paper for ages, refusing to look at a walkthrough. Checked the comments for hints in the end, and it seems I did put the right code in (As well as numerous definitely wrong codes!)
So, I'm a little frustrated that I didn't see the end. In all honesty though, I still really enjoyed this.