Congratulations on finishing your first big coding project!
There are no bugs that I spotted and the controls feel fit for the purpose. It takes a while to get above the 100 gold investment and start making money. Smaller fast-paced sections may work better for keeping player engagement up. The draggable actions are neat, but it feels like any of them will do the same job and there doesn't seem to be much reason to move more than one. Allowing them to continue working after being parked somewhere, or having clients make demands for something specific could add some extra strategy.
The animations are nice and the different types of clients give some variety to what you're doing. Your original music track would have added a good bit of atmosphere, a shame that it didn't get used.