This decal isn't very high quality....
I would recommend practicing using programs like Inkscape, Illustrator, or Photoshop (though if you use the latter be sure to get a more recent copy -- there are features which will make your life much easier for this kind of work) before you release anything else. Blockland decals are best designed with vector software which enables you to create the best quality decals. It also makes creating transparent and high resolution decals easier (both of which this face is not). If you need any reference for constructing things out of bezier curves and basic shapes I release all my decals with the .ai illustrator file with all the layers and objects I used. To practice with the pen tool I would recommend tracing as many things as you can, whatever the object is. After you get good with that you can easily transition into making very high quality art which is surprisingly easy to create.
Im thinking of creating a series of tutorials which will walk people through creating good decals with vector software.
