Great work, it has good pace (yeah, it's short, but still, it didn't get boring at any point so that's a big plus). The camera work was exceptional in my view, and I think the actor did very well too (was it you?). Colours could have been a touch warmer I think, since the film is half adventure half comedy.
The special effects sometimes where a bit off like when the light flashed up his arm at the beginning, it didn't blend too well with the realistic feel you tried to create. (To justify making that point, all good sci-fi has to be grounded in some way or another.)
Over all, I really liked it!
I left a comment on the video but just in case people here don't give it a chance and click on your link, I wanted to say that.