I agree with the comment on background, yours looks fuzzy, almost like you barely tried to draw it. No offence or anything. My strip is set in a general store which should call for a LOT of backgrounds. But I have a way of circumventing the needless drawing... I don't draw backgrounds.
Don't missunderstand me, I don't mean NEVER draw backgrounds, but only draw the background elements that you need for the strip, for that story. Ask yourself, do I need to draw that lamp, table and chair? If you do, draw them nicely. If you don't, do something else. Your 2 characters there are going somewhere, so put them by the door... throw a light swicth on the wall... stuff like that.
You have intense light in your current strip coming from the lamp. I can tell because your characters have intense shadows on them opposite the lamp. In a room in which there is only one light on, the wall would not be that bright all over. Tone down your background color in that scenario, and in general. Reducing the saturation and value of your background color is good in most situations anyway. If there's more light in the room, your characters should be lit from above a bit too. Cielings are white because they're meant to reflect light down for better illumination... things in general are commonly lit from above. When using gradients on walls and sky, it's always better to use a linear gradient than a circular one; skies are whiter on the horizon, walls are darker at the floor.
My best piece of advice for you is 2 words: Visual Economy. You don't seem to be using your space effectively. You have huge areas of blue background filled with a tiny little dialog bubble. Try pulling the elements in the comic panel closer together. Move in for close ups, pull back for long shots and change angles to increase interest. You are NOT a newspaper comic. You are not confined to a set number of panels from a single angle like Garfield. You are an internet comic, you have no limits. Mix it up a little. Stagger and overlap panels. Do close ups when a character's expression is important. Choose your scene elements based on what will tell your joke the best, not because its your default. What might also help your visual economy is changing your dialog bubbles. Don't uses circles because it's hard to fit text in there. Draw a rounded box or at least fit your text into the circle better. In Photoshop (and I'm sure in other graphics packages) you can select portions of text and change the spacing or even squash and stretch it so it fits nicely in the bubble.
I started doing a more comic-book style format with my strip over a year ago and it completely alterered the look and feel. It made it better.
You're ten comics in, you're not locked into anything. Play around, have fun.
I hope this helped. If have any questions, let me know.