I found the score property in node hill but I want to know how to use it and anything else you can do with it.

score is part of the player, so to get the player's score you would do player.score. To set their score you player.setScore(100)

A script changing each player's score to 100 would look like:

Game.on('playerJoin', player => {
player.on('initialSpawn', () => {
player.setScore(100)
})
})