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.