Hey! If you're the first person to do this, the high score will be 4. Unless you beat that, the high score will be 4 to all other players until the player that beats the high score comes. Click the up arrow to avoid hitting the buildings, and also don't go up too high. You don't want to hit the edge! The score increases everytime you pass a building.
I want to thank @vonkk for giving me the tutorial so I could do this project. And of course, me!