Considering the subject matter you've chosen, yeah, it's alright. Normally I would complain that it's a line drawing, and a really simple one at that. Not that line drawings can't be both complex and difficult. One of the hardest assignments I ever had in a drawing class was to make a line drawing of a still life (this after years of filling in my drawing with shading and other details that can give a drawing strength in areas where the basic lines may not be perfect). That said, this is not a complex intricate line drawing. But again, considering the subject matter, there isn't too much detail you could've filled it in with anyways unless you decided to add color.
I notice I'm not the first person here to point out that it looks a lot like something which was traced. OP, you've denied that it was traced, and I'm willing to take you at your word. But the fact that people think it looks traced is something that you might want to read a little more into. If you want to get better at drawing, one of the best things you can do is watch other people who have been drawing for a long time, and see how they do it. Even when doing a line drawing, most artists usually rely in a system of transparent construction which can be erased later (though some people, myself included, like to leave it in the finished product, as it can itself add some amount of interest to a piece). This is also true when it comes to cartooning. The reason that your piece looks traced is that because you haven't used transparent construction, so while it is difficult to detect where things are wrong, there are subtle problems which the mind notices even if it can't pinpoint.
Also, can I ask if you made all of the lines as solid lines? Because they don't look sketched, they look like you put the pencil on the paper, made a solid line, and then removed the pencil. That's a pretty common mistake that amateurs make, but the fact of the matter is that you'll rarely ever see a professional artist drawing in that way. Most of us know that sketching tends to produce superior results. Drawing one solid line, ironically, is just way too hard to pull off.
Also, you've drawn it on a piece of lined paper. You can protest all you want, and say that the drawing ought to be considered on its own, regardless of the paper you've drawn it on. But in the real world that shit don't play. Sketch books aren't that expensive. Hell, if you want just steal a couple sheets of printer paper from the library. But if you want your drawings to be taken seriously, you shouldn't put them on lined paper.
All these technical issues aside, I would also say that your subject matter does leave a lot to be desired. You're probably at an age where you want to draw things from MLP or other stuff like that. And that's fine, we all go through phases. That said, I've given you my opinion here much like I would anyone I was critiquing in an art class, so it would be remiss of me not to point out your subject matter. You've drawn a flat 2D pony with no background. If you were going for an abstract look that would be one thing, but I don't think you are. So if you want to really explore the theme that you've chosen, you'll want to start adding a background. It doesn't have to be horribly detailed (in fact, considering the simplicity of your focus I would suggest against it), but it does have to be something. A pony floating in space does not a good drawing make.
