A few suggestions that I have are: increase the amount of cheese required to export a level to maybe 100 cheese, allow popular levels above say 75% or 80% popularity to earn cheese, and also allow maybe a comments section at the screen where people vote so as to let the level creators know what/how the level can be improved.
 "Bunny Flags"){kind=icon}
 "Transformice"){kind=icon}
 "Mud and Blood 2"){kind=icon}