Update

- Added a level on the water (will be refined)
The forces of General Zmyshenko added:
-Banderlodka with a machine gun;
- Battleboat SHS-88.
Donbas forces added:
- battleship
- Boat
- UAZ with a grenade launcher

- Removed the open chassis of the fighter
- Added free game mode (Sandbox)
- Fixed bugs
- Slightly increased oil gain