PlayerController goes on the ball object that will be the player. Camera reference, take any. Checkpoint reference will take each individual checkpoint
SpriteBillboard goes on Sprite, it'll make it billboard around teh camera
TV appear goes on a empty object, connect the key object and images on the UI Canvas
storyscript, mainmenuscript, exitGame, endgame, ContextScriptts goes on a empty object in corresponding scenes
CollisionForward detects collision with walls.