Use up to stack paper. If your stack gets full, press down to deliver it to the truck, ready to be sold. If you run out of paper, you can buy more by clicking on the blue button. Press right to sell. If you run out of money buying paper, you can use trash to replenish your money. You can also buy more trash.
This was made all on my own. I painted the paper, and the background. The buttons were from the scratch library, and I used the text feature to write on them.