I don't have the heart to tell him

My 4 year old is playing a game on his little tablet. It’s a racing game but it’s set up for 2 players and he doesn’t know that. He thinks he’s just racing the other car.

It’s in split screen and the other car is just scraping against the wall on the track. He keeps winning and he’s so excited about it. I don’t have the heart to tell him what’s going on.

He keeps jumping up excited he won the race and high fiving me.