@Griffian
Salutations! I read through your comic from beginning to current. The simplistic style is actually quite an easy translate and it's jovial enough that the tone of your comic is well established from the outset, which is good because you want your audience to be able to identify theme pretty early. I like that you've chosen a grayish theme, however, one of the problems with this is that, in any given panel, you're using a hand full of the same types of gray and so there's a loss of character for your actual environment.
Now! I will explain this so you know what I mean. The environment itself is post-apocalyptic and in every comic I've read that did a good job of making the world a character in and of itself, the back ground was tinted or colored in such a way as to make you feel like you were part of it. Examples: Gone With Blastwave, Romantically Apocalyptic. These two have wildly different themes with similar variations.
You'll notice that in Gone With Blastwave the colors are warmer, which gives you a feeling of it being hot (and everybody is trudging around in a ruined city in heavy armor so, you can imagine the misery). The entire point in the beginning is getting out of a vast city which no one seems to be able to do. That gives the ruined city a bit of its own personality, like a maze that seeks to eat all who enter. It's a fun idea and makes for good gags. Since I can feel the city, the temperature because of the warm colors, and get along with the characters (whose helmets denote who they are, which is clever when you have so many people wearing the same outfit) I can really get into the adventure.
You'll notice with Romantically Apocalyptic that the colors are cool for the most part which gives us an idea that the world is cold. (Which, nuclear winter is a thing so, it makes sense) The characters are pretty much working in similar colors and hues of black, gray or blue, however, each of them have a pair of goggles with a bright color that helps us identify them immediately. So, I know them and their personalities as well as the personality of this ruined world that is trying to kill them (and Zee Captain, who is always rather sunny and suitably deranged).
These two stories happen at opposite ends of apocalypse in terms of color tone, but they both have clear voices about their identity and the varying shades of warm or cold colors accent that and give the world a strong presence. To make your wasteland a character, I'd think about introducing different types of grey, blue, browns, anything that can bring your audience into the environment. I might also suggest doing the same with your characters.
Upon my first look, I actually had a hard time immediately identifying that the other characters had come back more than once, because the same gray used for your protagonist was the same one used on the people around them. That made it hard to make constant distinctions from the off, which can hurt your narrative in the long run. The actual designs are really neat, I just think they need a little color or something identifying to help them shine.
You've got a neat idea here, there's nothing wrong with a sort of gag-a-day format for an apocalyptic wasteland. You don't have to be overly detailed (as the comics I gave you are very detailed, and that's just a couple of styles, totally not a requirement haha) or have overly complicated gags. I think your humor is fine, it'll just help your audience to be able to identify immediately who is who and maybe feel like they're part of the wasteland.
Hooooo man that was a long one. If you made it to the end here, you're awesome! I hope this helps you and I wish you the best!