Cool programming project. I appreciate the dedication of learning a new programming language to make this! At first I thought it was only a simulation of the hand crank motion, before realising I could buy some upgrades like in some clicker or idle game. It would help if those upgrades looked a bit more distinct visually.
I dont' know what more I can do except making more money. It would be nice if every now and then I get rewarded with a sound effect, too.