Not bad! Like you said yourself in the description the ending scene where he quickly wakes up could last for a few extra seconds before fading to a black screen. Just to make the ending less abrupt.
It seems like you were going for a monochromatic colour scheme, so I won't accuse you of not colouring the project.
I can't offer any suggestions in terms of character shading, as it seems you decided not to use any. However the shading you used on the objects in the background were well done and dream-like...which is what I'm sure you were going for.
The line art seems a little bit sketchy, but that may have been an intentional stylistic choice or due to the fact you were trying to get this project done in time. We've all been there at least once. :P
It'd be interesting to see if you ever revisit this piece, overall good work though!