Basicaly, you want a game made and then change sprites ? Sorry don't have that. I have hints on how to make one yourself though if you like.
CookieClicker is an incremental game, and I know you can even find some "incremental game generator" online, where you only have to replace assets, and choose building types, power, prices, ... Orteil (the one behind coockie clicker) even made one (here is the help section, the game maker is under maintenance).
As for the coockie clicker game, it's realy not that hard to build. It's a sprite that you click, it does some effects, it adds each time points to a cookie total. Buildings are also just sprites, a base price, and a counter of how many you have. Everything else is calculated every tick with good old maths, functions, ... and finaly displayed.
One last thing, if you are going to make one of those games, try to take a look at this article on coockie clicker, explaining how it did things right.