I like the thought of a cubicle character. I felt that the Side light bulbs flashing down on the ground was not necessary. Since this is your first, it's just a start and you'll get better. The particle effect transition from black to the next scene doesn't seem like a dream effect. The scenes were quite dull. Him waking up looks to me as a flat image. For your next work, focus on the overall.
Ill be looking forward to your next work :)
As I, Im a beginning artist wanting to work on animation
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