mildly funny
I liked the silhouette animation at the start. Unfortunately, that was just about the last animation in the piece that I liked. After that, the characters just slide around, which wouldn't have been so bad if you hadn't set our expectations higher in the first few seconds.
The guest looks so different between the exterior and lobby shots that I wasn't sure it was supposed to be the same person.
Why do several of your characters look like their necks are rotated ninety degrees so that they point straight forward out of their chests? The guest in the exterior shot looks like this, and then later one of the hotel employees does too.
You've got stray pixels on some of your pieces so that, for example, when the manager hands over the key small glitches appear on the wall behind him.
Going up the stairs it looks more like he's riding an escalator.
The 3d effect in the hallway scene (where it looks like the camera is panning down from the ceiling to maybe just above head level) is done well enough to seem out of place with the crudeness of the rest of the art; you might want to cut that.
Finally, it's an awfully big setup for a pretty small joke. I think that was the point, but... meh. It doesn't quite come off.