How do I make a light for my game?

Hi I wanted to make an effect just like the drawing here that I made

I wanted to the shadow layer act like an mask for the layers below and there be a light object that can show things that are on it's area. How do I make it?

I was saying like, there be objects that appear NORMALLY, even with the layer, to apply a night effect

In the first event, change the layer 1 opacity. For example, set it to 75