Not bad.
The plot is very interesting, and depressing. You don't bother to try and make it a lighthearted issue, so kudos for that. The artistric isn't particularly good, but it gets the job done. As you said you were on a time-crunch, so issues like coloring can be ignored. The movie was in fact a little deep, and some of the animation you did, such as turning that tear into a fake smile, was extremely creative.
The characters are all well animated, and I like the proper use of shadowing, both at the beginning and at the end. Overall the music does a good job of conveying the topic, but after a while it just feels to blend in, and is rather easy to ignore.
The only flaws are the artwork, which is explanable by the fact that you had 5 hours to complete this. I also would have preferred dialogue to text, but again, you prboably didn't have enough time or technology to create voices. Overall, a solid film, that could have been improved some.
In addition, the fact that we weren't able to fully comprehend the characters and sympathize with them, as a result of the brevity of the film, does leave the viewer hanging. For instance, why would the girlfriend stay with him after he hit her? Surely she could still leave. Ovrall the issue seems to be somewhat oversimplified, but not to a major degree.