Love this game! Longest game I've ever played. No other game allows for this much play for no money. Have i bought things? Yes, but the point being it is optional not needed to move forward. You MUST understand the need to have both energy and regenerative statues. This allows for a quick refill of energy. You must always be swapping for higher sizes in both . Don't just buy everything offered to you. It really is a fun game. I'm currently at level 217 and headed into Atlantis!!