The levels start out easy and get harder as you progress - so much so that it becomes impossible to pass a level without boosters... But the game doesn't give many boosters and the ones it does give don't last long. So you end up spending on boosters. Quite pricey. And those don't last long either. Hm... Oh, and I have to shell out AGAIN for the piggy bank of gold bars?? That I EARNED WHILE PLAYING THE GAME?! WHAT?!?!... Literally no point in playing other than to throw money away.