First thing: You can reply to your own posts. If you make a new thread every time you make a new batch of comics, we tend to ignore you for spamming. The only exception is when you make separate threads for different comic series.
Second: A lot of these just feel like you're trying too hard. There doesn't seem to be any actual jokes in most, and you rely on changes in background or use of props to substitute for jokes.
Because of the limitations in the format, your jokes have to be 90% dialogue/narration, and you're not really delivering in the few comics where there is joke potential.
You'll get a hang of the flow that gets you successful comics. It jut takes time. I suggest browsing the top rated list and entering open comic contests; they'll give examples of good flow and the constraints of the contest rules will help you figure out ways to best use the format.