Thank you for playing! Signs are random and are just setting elements.
Secret(yellow) deliveries are less obvious than the correct(green) ones, but they give more points.
As for the copyright, we are not profiting from the game, and we will remove a character if we receive a request from the owner. We just wanted to pay homage to flash games of 2000s and characters popular at that time.
2D art was drawn by the artist of the team, except for two button assets that we already listed in the description.