This is actually really cool and fairly well done for a first animation! I think the sound effects are put to really good use and the use of colour over the otherwise entirely black and white animation is a very powerful tool with a strong effect on the viewer. So, there's some seriously strong points here!

That said, there is also plenty of room for improvement! First off, this animation is just honestly way too short to throw a "to be continued" in there. There simply isn't enough content here to draw viewers to a strong enough conviction that they will follow you in order to seek out the next installation.
Backgrounds are a really big thing for me and you didn't put very much work in to them here. For the most part, your backgrounds are pretty much just empty save for the clock. I'd say putting a little bit more work in that department will go a long way.
You could also smooth out the animation a bit with the part with the arm by just creating more keyframes, it's a little jumpy.

Anyway, this piece is pretty artistic and I think shows a lot of potential. Good luck, I hope to see more from you in the future :)