A birthday t-shirt for a gotcha player

Recently I was baffled with designing a t-shirt motif for a gotcha player. It is obviously pretty easy to come up with a gun but what's next? The bullets used at gotcha are a kind of bubble filled with colour. The bubble bursts once you hit something and sets the colour free. Therefore the gun was made out of bubbles. A gun alone isn't very useful and so I gave the motif a name. The "bubble gun" was born. To make it more eye catching I also brought in a second line which tells "sharp shooter" giving the t-shirt wearing person a special image. The print is placed on the breast and a small "bubble gun" is placed on the lower right rear side.