I can only agree with others. You only have 50-60 energy bar which regens very slow. It is enough to clean some small patch of grass or flowers, ant not enough when you have to clean something bigger like rocks. Game is designed to waste your time and money, pay 2 win system unless if you are okay to advance like a snail and keep checking energy 24h. Other things that gives you energy also need tools which either cost emeralds or money if you have no time to play 24/7 and fulfill ridiculous task