This is my first design.
What I'm going for is that the monster is having a hard time getting to that last, pesky victim.
Too complicated? Not enough detail? Just sucks?
Let me know pleeeeeease!

haha this is actually very funny, but I don't know if the placement on the shirt is doing it justice. Might be better off having them in a row so it makes more sense that it's a series

I second what jpiatt wrote -- also lines for shaking. I think you also need a screen showing the monster ripping the building out of the ground.

Thanks for the feedback, very helpful.
I reworked the composition to make it more logical, and also added those "shaking" lines. (I had them in my original sketch but they got lost in colouring).
I'm not sure about the bottom placement, but what do you think about the comic strip boxes?

I like the boxed style of the right-side t-shirt, but maybe not so boxy (rounded corners, more of a hand-drawn look, not necessarily connected). I think a top or side placement would work best.

emm.. i dunno..
I actually prefer only the middle image on the tee.. it's funny enuf. simple and nice plce funny.
You need to work on the tail..wrong placement and mayb make the Dino fatter?

it's a bit too complicated looking. maybe remove the two buildings just standing there? or just use one of the images. either the middle one or the right one.