Hi, whats the license of that Sprite? I´m working on a small Game and use it as a Placeholder at the moment.
But i´m not sure if i can modify it or can use it at all in a final Game.
You can do whatever you want with this, I'm just happy to see someone is using it.
I can't assure it won't appear anywhere else though.
Also, you can absolutely modify it however you want, If you use aseprite there is the .ase file in the folder that should be really easy to edit.
Just send me a link to your game if you end up using it ;)