Great game. A few basic management game. More of a monster collection game. But still really fun. And best part no energy! That's right zero energy! There is still everything else in a monster collection games. Gems, packs, different tiers of monsters. But no energy! It's a bit confusing. They don't tell you everything. But almost everything has a little question mark that explains thing. Plus you actually get gems for clicking on them so go for it any ways.