I have to say that you have the best example of the shine effect. I think you might just be tied for 1st runner up, but a have a few things to imporove on. I think I would like to see the black outline of the star thinned out and a darker purple for a back ground.
I would also like to mention that the position of the M is important. I like how you positioned the M inside the star and had the bottom legs positioned perfectly but it is also very important to to have the top points positioned to merge more with the upper indents of the star and for the bottom point to merge with the bottom middle indent.
Also I recently added some comments for everyone check out so be sure to do that, best of luck.