There's some great drawing on display in this comic, but something about it makes it look...strange. It's weird, because from the thumbnails it looks really, really good! Then when you look at it full sized, something looks off about it. Maybe it's the brush size? I'm not a great artist, so I can't pinpoint the real issue. All I can tell is that your art is SO CLOSE to jaw-droppingly amazing, and you can easily cross that threshold if you can identify what the problem is.
EDIT: Actually, I think it really is the brush size. You can especially notice it on page 24, where the shapes are so small but the lines are so thick. Try using a smaller brush size for your outlines, and see how it changes! Also, have you tried using Krita, or some other "pro" drawing software?
^^^Best evaluation I've ever gotten on my art. Thank you so much! No one has ever taught me to use different smaller brushes for stuff in the background. I really appreciate that!
Putty Comix #3 is on the way. Just a few more pages to color. The next comic will be done entirely digitally and I will be taking your advice to heart! Thank you again, johnbyturnip!