itch.io

Hi! Thank you for your question! It basically means this:

You may recolor/adjust/add sprites to your liking and use them in private or commercial games.

You can use the sprites for making paid or free games. 

YOU CANNOT: RESELL THIS PRODUCT AS ANOTHER TILE SET. OR USE THE IMAGES FOR SELLING IN MEDIA OR ANY PHYICAL PRODUCT.

Sorry I know license can be confusing! In the future I will just post the explanation above:))))