Hotshot challenges
There is more that you could add to this game. Let me give you some ideas for inspiration:
You could add even more players to create even more fun and chaos on the circuit. It will become quite crowded around the keyboard, but that is part of the fun.
You can improve the endgame. Instead of the text bubbles, you could include the "YOU WIN!" display that we created in the previous project. Use Backpack to copy the sprite and then adapt the costumes and scripts.
Of course, you can also include more race tracks. You might even try to build a level select menu, so players can choose which track to use before the race begins.