Hmm, ok. I’ll try and give you all the CC I can think of. Hopefully, you can take it to heart and start adapting it for use in your future issues:
First and foremost: Downsize the images, add a border, and combine them into a single long file. Why? Although this comic can be read on most monitors now without scrooling, the file size of each image means that you have to download each shot of your comic, one image at a time. This can be problematic on slower connections, and can even break up a story. Another reason for smaller images is less scrolling. I’ve talked about this in the past, but you need to review the pacing of your comic in thie sense of how long it takes the reader to even see one sentence to the next. This isn’t a collection of screenshots, it is a single flowing story you are trying to convey. Trading a comic like “I saw a tree today… …it was green” does not do well for getting an idea across, let alone an entire backstory. For width of images, I still use 1024 wide including about 10px of white border. I wouldn not go past 1400. you can also crop your images vertically to reduce dead space and scene repetition, Unless you plan on adding a lot of text in a scene or are conveying a particular sense visually, there is no reason why you need the dead space above the head, or anything below the belt line of your main character.
Next, downsize and change the fonts, and use speech bubbles. I find that in the text comics I make, 14px sized comic lettering fonts work perfectly for spoken word. Take the time to find a good comic lettering font. Blambot has plenty of these for free, I’d suggest perusing the rest of the site for other great comic fonts as well. Use speech bubbles for spoken word. They allow you to put dialogue over any scene, regardless of the color of the background, and clear up any ambiguity in who is talking. I make simple speech bubbles using an oval shape with a polygon lasso tool for a tail, white, 80% opacity, with a 2px black inner stroke. making your own allows you to control them completely. You pick the size and shape and can do it after you make and place the text, so it all works seamlessly.
Also consider more dialogue between characters and less inner monologue. Telling a backstory through text is a cheap way to convey something in a graphic comic. If you must give huge walls of text to tell a broad perspective, you might want to consider images to accompany them. Maybe as the character is talking about these shields being designed, you should have a scene of scientists working on one. Maybe you should have had a scene of the fog or whatnot overtaking and killing people, like an image from the past, as he described it. I’d gear back on the inner monologue altogether though now that you’ve established the plot, and try to convey the story through conversation between people and actions. It allows the reader to more discover events as they happen, and deepen the reality and immersion into the story.