If you’re going after a magazine look, it doesn’t look like one. It looks more like the cover of a booklet or a report.
A magazine needs a clear mast or nameplate. This doesn’t have one, unless the name of it is New Republic of Texas, but that doesn’t really make sense. It also says PASSPORT, but there’s no obvious clue as to what that means since it’s obviously not a passport. A magazine (or a report or a booklet) always contains a title or teasers as to what’s inside. Your cover contains no information about what this magazine/booklet/report is about other than it might have something to do with Texas.
It’s nice, clean and simple, but if I saw it on a magazine rack, in a library or sitting on somebody’s bookshelf, I’d have no idea what’s inside it.
Moving past that confusion, what are the purple plants? Are they a clue about what’s inside? Are they a native Texas plant? What relevance do they have? The purple and red really clash with each other. They’re analogous colors of almost the same value, which causes them to visually vibrate (for lack of a better term).
You’ve made the seal, the words beneath it and the passport logo flush right. There’s nothing wrong with doing that, but they’re close enough to the same width that they look centered, except the seal, which is pushed off to the side. Yeah, I know that if I measure the edges, they’re flush right, but my brain keeps thinking that the seal needs to be centered above the words — possibly because the seal itself is vertically symmetrical.
Aesthetics aside, and back to what I think is most important, there’s no words or visual clues on the cover of this mystery publication that tells me what it is.