Interesting game! I included it in my compilation video series of all of the My First Game Jam: Summer Edition games, if you'd like to take a look :)

Controls:

W,A,S,D (in main game) - Move The cursor (@) around the screen

W,S (in menu) - Change which building is selected

M - Open the menu / Close the menu

B - Build whichever building is selected in the menu

R - Remove whatever building your cursor is over

Buildings placed next to each other will automatically transfer items between them. Place buildings in a way to create a supply line that ends with your goods being sold for money! Use the money to make an even bigger supply chain!