How did you implement the theme?
The theme Light is interpreted in many ways. The protagonist's heart is heavy, and through interaction, the player can make his heart feel light. The game is set inside a theatre (MANY LIGHTS) and there's multiple other variations of the terminology and theme throughout the game.

How did you add the special object?
The game is set in a theatre. Where the curtain is both metaphorically and quite literally closing on our protagonist.