You can use it BUT you have to credit me and all the artists linked below and you can't use it for commercial things. No commercial use means you aren't allowed to make money with anything you created with this tileset. Credits here: fav.me/d6321qy
Attention: Rows 5 and 6 have floating pixels which you should manually adjust after downloading this tileset atlas and before importing it into Unity or elsewhere. There might be other mistakes but I only noticed these two so far.
This publisher no longer uses DeviantArt, so you'll have to DIY.