Under what licence is this tileset? Can I use a modified version for a commercial product?
Hi there! The license for all my assets is an attribution license and can be read here: http://untiedgames.com/files/license.txt
(In addition to attribution it specifies that redistribution is only allowed as part of a game or game-like product.)
Both commercial and noncommercial use within those terms are permitted, and modifying it is fine too. Let me know if I can answer anything else!