Good game. Nice graphics. Plenty to do. Environments are unique. Quick structure building, is nice. Reward system seems better than most. I like the way you use ads to reward players, but only if they choose to watch them. This game has great potential. Energy runs out very quickly. I know I could buy energy, but with how fast it's used, it's not worth it to me. A one time fee for a version without energy requirements would be better.