It looks good. I always suggest people search on their target keyword and see the other thumbnails that come up in the search. Then ask - does my thumbnail stand out? Does it look like every other thumbnail in my niche? Would I choose it out of the list I'm presented with? Do others provide better information on the thumbnail?
I say this simply because when we have had other people in your niche post similar thumbnails, a quick search showed that the style you are using is very common to certain search phrases and may result in you having a great thumbnail, but it then gets lost because everyone's thumbnail is almost exactly the same.
We see this in the gaming niche a lot as well. Someone creates a great thumbnail, but then in the context of all of the other thumbnails, it is almost exactly the same and doesn't stand out.