This isn't bad at all. Aside from the lack of sound effects and the obviously incomplete walk sequence at the end, my main issue was the grammatical errors from that dialogue between three characters. I have a feeling you copied and pasted some English translation of whatever was originally typed. Those sometimes can be faulty and it reads like broken English. If this isn't your first language, then that's understandable, though I'd try to learn more about its grammar for future projects. While music can be a nice addition, I wouldn't call that a requirement. Sometimes people just opt for silent animations. In all fairness, we can't always add audio when projects are left unfinished. On the plus side, the plot had potential, and you had some decent movements. I would've liked to see what follows. Oh well.