What does the Cinema offer you? If nothing, how about speeding up the fastbar or giving you some exp? The more you stay, the more exp you'll get when you leave. You could also add an achievement to unlock 3D glasses!
You could add a new area: Reef. You would have to buy a submarine to unlock the Reef. Once you had it, you could dive in under the sea through the fishing hole and play something like a minigame, where you have to avoid fish coming at you, since you are moving in the opposite direction. Depending on the score, you would either get money or a number of fish to sell at the market. Think of that.
 "Pingy the Ping Idle RPG"){kind=icon}