I don't mean to be mean, I'm just trying to let you know that it is easy to see. The character sprite you are using does not belong to you. It was created by Shaun Spalding.
Here is a link to a YouTube video in which he shows it(in which I'm sure you know of).I mean no real harm. I am just warning you that you should make your own game art, even if the game is not for a profit. You may get "Commercial-free" sprites from random people, but it is always better to do your own work for more originality.