to unlock the heart skin, you have to tweet about game on twitter. to unlock that fidget spinner thing, you must play 7 consectutive days. to unlock the shark, you must eat 100 people. to unlock the blue weird alien thing, you must eat 15 policemen. to get the brown cat, you must end first place on the classic game 20 times. if you want to unlock the mouse skin, you must eat 75 buildings. to unlock the white cat, you must reach the silver rank. to unlock the orange cat, you must reach the silver rank. to unlock the black cat, you must reach the diamond rank. to unlock the black bat, you must reach the platinum rank. to unlock the red bat, you must reach the master rank. to unlock the fire skin, you must reach last rank.