How about a minigame where there is a team of 5 ghosts and 5 mice and the ghosts have to steal the cheese from the mice.There is a shaman that has to build a fort to cover the ghosts and the ghosts will have a weaon to destroy like a balloon or ball cannon.The 4 other mice have a weapon too.It shoots decoy cheese with the same structure of the shamans fort to confuse the ghosts.(Oh by the way the ghosts are mice in the server forgot to say).The four mice can only shoot the decoy gun once so they have to choose wisely.After they have done the decoy cheese they die and the can spectate the ghosts.If one of the ghosts get the cheese within two minutes they win.And if they don't..well...they lose.

Edit:The shaman choose where the actual cheese is...(Facepalm).