thanx wazumbi, this is the purpose of this thread, create simple nice games/apps and sell them for a little amount so people can afford it, and they will change a little the game.Very cool concept. This game seems to have a lot of potential. Why you selling it and for so little?
There is not only one license for sale, everybody can buy it (projects incl. graphics and source code) change some graphics and publish his own creation with minimum work...
I have used purposely lots of very importent libs like Admob, Animation, LibGDX so other could learn from it, (great for newbies...)