How can I get more coins to put things on the island to get prestige to play?

Play the game often. There are 21 buildings that will generate coins, play the daily puzzles, join a team and share coins and energy with team mates, visit your friends by clicking on the globe, (bottom left of the screen), you can earn gifts, energy, or coins by clicking on you friends gift icons on their island, you also get to see how others decorate their islands. Go to the gamehunters.com web site check back every few days for new gift codes. And if you feel wealthy, inpatient, or are eager to play you can buy coins using "real money".