It's a very nice game but at this point it lack of things to do into it.
I am near 2 hours of game, I am level 12 and I have mining rods on every island that works for me, and my furnaces who works for me too. I am just here waiting for gems to show up and gold to farm without really using energy so my little provision of fish is more than enough. The game is actually running in background, waiting for a new level or enough gold to unlock an island and put a mining rod on it...