Added mini-tutorial

Added small hints to the basic mechanics in the first level of the game.
How to equip a torch, get skill points, etc.
They will appear as windows with text, this will give players a better understanding of how to interact with the environment in the game.
Also a reminder that I am developing a sequel to the game, which you can see here https://store.steampowered.com/app/2399930/Imprisoned_Hyperion_2/