This is one of the genres of video games that I love, I always liked games where you start slow and build up more and more.
Graphic-wise is simple but effective, your type of game and the graphics fit very well together.
I also liked the sound effects, they are not annoying at all and they complement with the art style.
At first I was a bit lost in what I was trying to achieve, but figured out quickly that I had to make money.
Maybe it would have helped to give information about at which price you bought something, because it is very difficult to remember how much I spend for every item I buy.
Good job!