Practical Guide
I downloaded this game, began playing, everything was okay. Passed each level on the first go, mostly with 3 stars, for 70+ levels. Early on in the game you earn more gold than your piggy bank can hold and that is when they start asking for money. Also, since I hadn't lost any lives, the free lives I won were forfeited. But the most annoying thing is that after I got out of the game horizontal lines appeared on my screen. The only way I could remove the lines was by uninstalling the app.