Choose your monster. Beat the crap out of your rivals. Rule Tokyo.
You know that old video game where you and your friends just annihilate the living HECK out of buildings, just because you hated the smell? This is like that, only you can touch it with your tender hands, AND, it's somehow even easier to play. Become the King of Tokyo. Ruin corporate headquarters. Impress your neighbors' babysitter. Make these monsters fight each other until all are shamed but one. It's going to get weird, and that's OK. Let it happen. That's how you know it's working.