I like your theme choice
It makes more sense to stash up money than, say, bananas; and money crazed people like myself are sure to like it. Also, I noticed the program gives a value to each kind of item, and makes the sum of all items on board your score. While this makes it more realistic, I can't help but feel bad over all those 5x and 6x chains gone to waste.
The light, relaxing music adds a smooth and pleasant feeling to it.
Really, changing something would just ruin this gem.
Here's a list of values
bronze coin=$5 silver coin=$20 golden coin=$50
bank note=$100 moneybag=$250 treasure chest=$1000
silverbar=$2500 golden bar=$5000