Big game update

Redone level structure in the game. Previously, these were levels following each other, now it is a small open world. - Increased functionality options in the main menu. - Improved save system. The combat system is slightly improved. - Added plot and ghost assistant, which tells the player that he now needs to make where to go. - Improved the balance of enemies - Added achievements - Added new swamp location - Added new field location - The city has been added. It plays the role of a central hub to which many portals lead. And that is not all. In general, the game has more than doubled and the content has become much more.