All collectibles before next scene?

Hi, I am currently working a maze game where the player must navigate around the maze and find the collectibles (paper scripts), there are also hazards (pitfalls and fire as of now) which restart the scene. I was wondering if there was a way to make it so the player must collect all of the collectibles before the exit (which leads to the next scene) becomes accessible.

Since the game restarts the scene when the player dies, it also reloads the collectibles, how can i make it so the the player loses the collectibles once they die. (I am quite new at everything, so if you could speak in simple terms it would be much appreciated) Thanks.