If you spend like a a good maybe 30 minutes on it then it would look pro. You kinda cant rush art but nice improv. :)

I've always loved three minute sketches(Hell, that's what most of my work is!) and I find this one to be exceptional! Love the scratchy outlines!

I'd say it looks good for 3 minutes. It's not bad, really, though it's a little difficult to make out some of the shapes...