Anyone else had this where the Simpsons house disappears along with Lisa? I can't progress anymore as when I try to do anything - including rebuilding the Simpsons house - it tells me to get homer or Lisa to clean up Springfield first. The problem with this is that there's no pollution to clean up and so this option in Homers tasks is greyed out.
Can you buy land? There's always pollution for you to clean up every time you buy a new piece of land.
Otherwise if you aren't very far in the game try creating a new account to restart your town. --- Games waiting to be on PSN: Dungeons and Dragons: Tower of Doom, and Shadow over Mystara Now playing : Valkyria Chronicles 2, Castlevania: Harmony of Despair