I liked the puzzles, but they aren't the primary game. It requires you to tap on buildings and wait. Or... skip the wait with gems that you can earn slowly. Or... get gems fast by paying real money. And... after your newbie protection shield ends, you must defend yourself against people who bought a heap of gems and upgraded the heck out of their bases early. If throwing your big fat wallet at people makes you feel like you've accomplished something, you'll be a true hero.