I do enjoy this game even though if you spend your money on it you will come realize that in some levels it is better to use the plants that the game gives you for reaching specific levels.So I do not recommend buying anything until you get to the end of the game.I love this game for my whole child hood.But I do not think it is necessary to buy any of the coins,plants,gems.Untill the end of game if you want to thats fine it is you.This is just a warning to be careful with your purchases. :)