I loved it.
You animate VERY well, and for your first submission, this is incredible. The way you blur things your eyes aren't focused on, your shading and light effects, everything was flawless.
Graphics: 10/10. You couldn't possibly do better.
Animation: 10/10. Your character's walking cycle and just about everything else looked just about perfect.
Sound: 10/10. You had sound effects for everything, even the elevator. The music was fitting.
Overall: 10/10. I will be surprised if you don't get a 4+ and daily feature. Good luck on your future flash animations!