An interesting piece, to say the least...
I like it, overall, though the second stanza of the vocals is incredibly difficult to make out. Had the words not been posted, I would likely have not realized there was a second part to the vocals, and even then, it took me a little bit of effort to register where they were.
I cannot say that this piece is one I feel is either good or bad; it is something which will appeal to me at some times, and yet I will dislike it at other times. However, it seems that it is, itself, a moody arrangement, so perhaps this is not so much an issue.
Now, as for the robot voice, I think it is actually a rather good addition to this mix. Perhaps, however, it could have been used for more than the vocals. The sound of it is as much a part of the song as is any other part of it, and some of the issue with it may be that the inclusion of the voice is so sudden. The beat of the music goes along very well, and then the robot voice jumps in with no warning, creating some rather interesting waves in the mix.
And, on the topic of sudden moments in this mix, its ending comes to mind. It happens so quickly that, on the first listen, I was actually caught off guard and had thought my player had stopped. You bring in a few new sounds, making it seem almost as if you are about to launch into an entirely new section of the mix, but just as some of the pieces become noticeable and the listener begins to focus on them, everything suddenly stops.
I can see where this can be used as a major part of the song, an ending to the craft in the game or an ending to the robot/traveler's journey in a rather abrupt (and likely dire) end, but for the piece itself, well... I feel it was just too sudden of an ending.
Overall, I feel that this is a good arrangement. Nice job on it.