Only issue I see is the third panel - "Why are you imbecile still doing here?!" isn't grammatical. "Why" and "still doing here" don't agree in this situation. If you want to stick with the word "Why", you could say "Why are you still here, you imbecile?!" if he's speaking to a single person, or "Why are you imbeciles still here?!" if speaking to multiple.
If you'd rather keep the general structure of the sentence, you can say "What are you still doing here, you imbecile?!" if speaking to one person, or "What are you imbeciles still doing here?!" if speaking to multiple.
Other than that, it looks great. I dig your perspective, and the art style in general is pretty rad. Great work!