I was thinking of something like achievements in-game, and you can get a certain amount of cheese for completing an achievement, (not like 100 cheese, but something atleast worth it), maybe the achievements could be like get a certain number of firsts in a row, I am sure the creator could come up with better achievements though! + If you think this is a good idea so the creators could see this please! :)
 "Epic War 4"){kind=icon}
 "Transformice"){kind=icon}
 "Enough Plumbers"){kind=icon}
 "Luminara"){kind=icon}