If so, have you ever heard of a game called Blastar?

BASIC was the easiest language to master at that time, and I also learned it when I was a middle school student. What was wonderful is the age that he studied it ― just 9 years old!
He created a video game, Blastar, as shown in the left panel at the age of 12. It is reported that, when he was asked the game, he said, "a trivial game, but better than Floppy Bird."
Surprisingly, the game Blastar is still available in modern age. If you want to try it, click here. It does not matter which is better, Blastar or Floppy Bird, since the backgrounds are completely different. The former was in 1984 and the latter was around 2014 or 30 years after Musk's first work.
Reportedly, Elon Musk sold the game to a computer magazine for $500 (equivalent to $1,200 nowadays). That means that he has been a good business person since he was very young.