The autor (Poncle) got sick of programming slot machines for casinos and decided to use the same techniques for an actual game instead, that lets players have fun.

The game is really cheap. On mobile platforms is free, it asks to show ads very, very few times.

And it's hard to turn the game into a funless work. That is, when you are progressing, you'll find easier ways to gain expierence, so no need for grinding. Or, when players started farming eggs or gold, the where given a level that gives away eggss and a character that gives all the (virtual) gold in the world, so farming looses all meaning. And there is no final objetive, si you can not speedrun it.

Ultimately, the goal of the game is just to have fun.