Visual overhaul: hands, shadows & space ships Update

Continued development of the game.
Hands have been added to characters and aliens, along with related animations. Shadows for many elements have been improved, as well as some graphics and effects. Perspective has been improved on ships, and their appearance has been enhanced. Certain UI elements have been improved, along with the behavior of aliens and animals. Minor fixes to various other elements.
The trailer, screenshots and gifs have been updated to the latest version of the game.