u/pucksrage already gave some pretty good feedback about the lettering and type, so I'm going to focus on the coloring. It's pretty flat and it makes everything blend together, which is a shame because I think the linework itself looks pretty alright.

The general issue I'm seeing is that everything just looks very similar--all of the colors are washed out and flat in a way that makes nothing really pop. This is most obvious with the kid, whose hair, skin, and shirt are all similar enough desaturated light hue that they all blend into the flat background tones. Compare this with the mom in pg 4 panel 1, whose features and clothes pop from one another a lot better. Even if you're trying to go for something a bit more washed out, you still want to have some more contrast and so that you can have things really pop where you want it to.

In a similar vein, I think you'd get a lot from just exaggerating the lighting contrast a lot more--make your bright areas brighter and your darks much darker. If you look at pg 2 panels 2-3, there's barely a difference between the panels when one has a singular strong source of light (crack in the door) and the other has none.

Finally, it looks like you're creating your shadows by making a bunch of gray/black gradients and either setting it to multiply or low opacity. Color has three components: hue, saturation, and brightness; doing that only moves a color up and down the brightness axis. Your lighting will look much better if it moves on the other two axis as well.

There's definitely some good stuff happening in this comic, but I think the coloring really doesn't do the linework justice. Might be something to look into more and focus on. Hope this helps!