The Matthew Broderick movie is called The Manhattan Project. I'd suggest that the coins and other collectables are the "crates" you can earn for wheel spins, but you have to spend banana "keys" to unlock the crates and spin the wheel. That means you can collect coins without having to spin the wheel if you don't want, and also puts more of a banana sink into the economy to even out your issues with too many too fast.
Odusei's comments