you get G from the goobers over time. You can also click the goobers to get 3 G. Go back in the shop after each upgrade. Click the shop door to access the shop. Click the book in the top left to access the tutorial. Press 1 to hide the book and press 2 to show the book. Arrow keys to change the page in the tutorial book.
Credit to toby fox for making the background music BTW the music Is: Hotel. from Undertale The game will get updated every now and then
