As said above, the resolution of you images needs an upgrade.
As for the art style, I can't speak on the Manga style as I don't tend to read much in that genre, but as for general technique:
You seem to be updating pages pretty quickly, and while speed is certainly something to be praised and can help to build up a dedicated reading base, sometimes it pays to slow down, focus on the storytelling and make more informed choices when it comes to layout, camera angle, lighting, etc (you may be working with a writer who wants more frequent updates. Maybe you can work out some kind of arrangement?). Some of the storytelling is a little hard to follow --- there's wonderful energy there and you have a really unique approach to mark making which shows that you've got something special. As a reader, we'd gain a lot from establishing shots. It's a little difficult to know where we are most of the time. Go through your favorite comics and focus on the storytelling...not just the story itself. A lot of the other stuff, like figure drawing, backgrounds and whatnot come from just doing it over and over and over again. Set yourself challenges for each page...maybe a fully worked background panel per page, then maybe two...keep re-evaluating what you're doing, but never stop doing, if that makes sense. Work out thumbnails before you begin a finished page. Make it hard on yourself and you'll grow both as an artist and as a crafts-person.
Invaded P3 is a good example of what I'm thinking: It took me a little while to realize that the character in panel 1 has his head on his desk. I think we need to see this action happening, or see it from a wider angle. Maybe we could have seen a more detailed image of the room on the previous page. Panel 3 is a bit more confusing. We need a lot more detail here to know what we're looking at, where it is, and how it relates to your characters. Remember, you may have the plot outline in your hands, but we don't. Help us along.
I really like the expressions of the pink haired girl. I think characterization may be your strong point, so give yourself moments to shine, but at the same time don't shy away from the things you struggle with.
Keep at it. I've been drawing for 20+ years and I still learn every time I sit down at my drawing table. I think it was Dave Sims who said you've got to draw 1,000 crap pages before you get to your first good one. I'm not sure I completely agree with his numbers and am not implying your work is crap, but the sentiment is true: work work work and you'll be rewarded! Thanks for sharing!
