Alright I was browsing through deviations when I saw this extremely well done and gorgeous comic page.
The colors are extremely vivid, the shading is well done and very nice to look at. You can tell miss bitters created a loud noise as she slammed her palms upon the desk, and quite hard it seems. The style is extremely unique, and I absolutely love Ms.Bitters design. The background may be simple but is seems to work quite well, especially with the nice additional wording on the chalkboard, paper, and even posters.
However Dib's arm is pushed a little far back, and his trench coat is a little off. On the last panel where Ms. Bitters is, her arms are a little short, and the first panel Ms. Bitters hand doesn't look like it's completely on top of the desk because of the angle the desk is pointed. Her hand would be a little lowered to fit the perspective the desk is going at. The speech bubbles, aren't varied, and are using the same tone of voice. When shouting, the bubble would spike up just like when bitters slammed her hand on the desk. The spikes mean something is making a loud noise or shouting in a living person's case.
Otherwise, this comic is very appealing. It easily caught my attention, and is very well drawn. Hope this was helpful!