Halloween background

[Wingy]

...but the game is free... im not really good with copyrighting and stuff.... isn't it ok to use it if we mention like in the corner of the image where it came from and who made it or who copyrighted it or something? And isn't it ok for using it as long as you're not selling?

I have like no idea copyrighting stuff... so can someone explain it to me if I'm wrong...?