It was an interesting story, but I couldn't think of much to say about it. The thing that I wondered about most was the voice telling him to go higher -- was it a yearning, a mental disorder, some kind of mental programming from before whatever happened, or some kind of communication from beyond?
I thought the other tower and other person might have been some kind of reflection through time until it actually attacked Mateus. Will his tower ever let some non-hostile entity find him? Or will his haphazard construct eventually collapse and kill him?