It seems like you've already gotten critiques by many people, but I'll just throw my 2cents in just in case other's haven't mentioned something.
I may just be really picky, but there are some things that kind of bugged me a little. I love the writing so far, I see nothing wrong with that :D.
The speech bubbles tend to get in the way in some frames, such as your most recent episode, the first 2 panels seem like the speech bubbles are in the way. Also, why are the bubbles so oddly shaped and uneven? Personally, I like smooth circles/ovals/rectangles/etc. that are usually created by a shape tool of some sort. Less distracting that way.
Also, the characters look too much alike. I know they wear different outfits, but they still look like they could be related. How about trying different body/face shapes? Distinctive physical features (glasses/freckles/big nose/different jaw)?
Other than those things, it's really well drawn and I enjoyed it. These issues might just be me, but I thought I'd put it out there and you can do with it what you want.
Overall, great work!