Update v20190428:
Fixed use of the main generator on the 1st level

Update v20190427:
Fixed the work of a large transmitter on the first level
Fixed teleport at level 3, when some players had difficulty in passing this stage. The card still lies on the floor in the basement, but if you did not take the card, the portal will still work again until the card is received.
Fixed textures in one of the passes at level 3
Added a brief information of the layout at the beginning of the first and second levels
Added Graphic Settings to the main menu - Ultra, High, Medium and Low.
Corrected the menu on each level - now when you click on the "Exit to menu" button - you really get into the Menu, and do not exit the game