Shouldn't you credit this guy on this page who made the resources you use? All characters, tilesets and pictures you use are made by this artist.
Yes of course,I had credit him, Also I had share a link to his page to let people know. It's written in the page game , the video ends and in the file Readme.txt
Ah ok! ;) Then no problem. The game you made is interesting BTW. Good use of those resources!