I have no problem crediting you. What would you want your name to be in the credits? "Pixel RPG Items By Pixeltier"?
It is a pretty basic concept and it should be finished in around a few days and maybe another week after that to add some juicy effects ;)
But ill send you a link of the product once on the play store. The game will be free but contain ads on launch. Thanks again for this pack also another quick question are you planning on making a monster pack? specifically platformer styled?