Overall it's good! I like the humor (although I thought the same thing as @Pablo.C.S about the punch line in this particular strip)
If I have one critique about the comic as a whole, I think it's the orange background color. The minimal color scheme is nice, and the complementary orange/blue arrangement is also good - but the orange is too saturated IMO, which makes it (a) a bit of an eye-strain, and (b) draw attention away from the characters instead of towards them. If it were me, I'd use a similar but duller or more pastel version