Prepare yourself for a huge steaming pile of advice.
Writing
The jokes are good, though the first one relies heavily on the word "************." The grain effect isn't really funny on its own--more of a "yeah, that's true" sentiment than a laugh. Throwing the profanity in there makes it funny for some reason. I'd advise not doing that too often, though, because it's an easy habit to get into and really isn't a good thing to repeat.
The second comic I didn't like quite as much. It wasn't as immediately funny. The advertisement at the bottom of the screen took a moment to catch the eye, since I read word bubbles slightly before looking at the art, and thus the joke lost some of its effectiveness. With the first one the buildup let you know exactly what was coming, with the unexpected addition of "************" making it funny. With the second one, while the joke is still funny it is less so. It has less punchiness, if that word means what I think it does.
Both comics have a very good mixture of jokes in the text and visual gags. Well-done there.
Art
The character art is very clean, very simple, and very suited to the style of the comic. Though the guy with the gun in the second panel of the first comic looks like he's petting it, which is kind of odd. Nevertheless, the character art is good. The background art needs some work, but you'll get better at that with time, I'm sure.
Not much else to say on the art front, really. You've started out a lot more professional looking than most webcomic artists I've seen. Including myself, which kind of lowers my self-esteem a little.
Summary
Not pure gold, but certainly not bad, with the potential of being very good.
Suggestions
For the love of god, come up with some original plotlines. You can do it. We know you can. Also, keep working to improve the art, even when you don't think it can possibly get any better. I can guarantee that you'll look back on these first few a year from now and say, "Was I ever really that bad?"
Keep up the good work.