Hello Jack. Thanks for playing our game. We did realize that bug where you have to place the cursor on the objects to re-interact with them, and you are right, it shouldn't be like that, sadly it wasn't something we could spend time on :<
About the light... We used Unity that already has an cone shaped light emissor, and we already have programed an toggleable interactor, so the only thing we really had to do was make the toggleable interactor turn the object that was with the light component on and off. :D