In games with more than one person, signs can also be used to talk to other players. For example, players can use certain emotes or voice chat signs to show what they want to do or to talk with other team members about what to do.
Overall, signs are a very important part of game creation because they give players feedback and information that can help them have a better time playing.
Tips: Playing game in spare time can help to simulate your brain actively. Let's start with brain games like sudoku, tetris or relaxing bitlife game.