What's the name of a yellow and blue double game?

These games are more representative of our childhood, unlike League of Legends, the glory of the king and Peace Elite, which have been popular among the public. We spent most of our childhood in the game web pages like 4399 or 7K7K. For example, Obi Island, forest firefighters, gold miners, bullet halls and so on. At that time, we just thought these games were fun and would compare with each other. Every generation has its childhood symbol, but with the development of the times, many games have been forgotten by us. In a chat, we may suddenly remember the comparison of childhood, so we began to miss these games and began to look for them.