Thanks for asking Ruxio. My license notes you can't use these tiles for commercial purposes. If you'd like to purchase a commercial license to use these tiles in a game, you can send me an email at zeshio.zworld@gmail.com.
If you'd like to see a free or pay what you want tileset, let me know and that might be something I can work up for people. I could start out with something basic and as people support the cause I can add in more stuff. It's currently not feasible as an artist for me to offer 1200+ tiles for free+commercial license. Thanks for understanding!