Does anyone know how to get rid of the white square behind the sprites.
Develop games in your browser. Powerful, performant & highly capable.
Make sure your files are saved in .PNG or .GIF format.
Make sure you have updated your graphics card drivers!
It also has to be made transparent using a program like Paint.NET (or Photoshop or Gimp, if you're that fancy <img src="smileys/smiley17.gif" border="0" align="middle" />), in addition to being saved as a .PNG or a .GIF.