Hello! This is a terrific tileset that I use in my game for GitHub GameJam! You can evaluate the example level here:
The fact that stops me before the alpha release is music! I will be happy with any help! Any music! :)
This is amazing, I love it!
As for music and sounds I cannot offer anything concrete but you can take a look at https://freesound.org - you should find something decent there.
Good luck! You still have a couple of days :)
In Unity you need to create: New > Material, then choose Sprites/Difuse, set the color to pure black and add it to every single object to make it hide when no light is over it. Then, you need to add a source of light to your hero. Check this out: https://manygames.itch.io/thestrangebob
There is a hidden area to the left, destroy the boxes to get access. There, you will find a tower, inside this tower every object has this material.