Small service update

A small update, in addition to the previously released big update. [list] [*] changed the start screen; [*] player health is now saved when switching from level to level and when loading the game; [*] fixed the problem of resetting settings on some systems, now all settings are saved as expected; [*] when moving from level to level, the player's weapon no longer gets stuck in the walls; [*] cosmetic changes at the levels; [*] minor fixes and improvements. [/list]