This is a very poorly made attempt of a sequal to the Xcom: Ufo Defense game(s).
The game is basically unplayable, geared so hard against the player that even on beginner level, you will fail and lose the game in six months no matter what outcome.
It was more like a very bad patch added to the origional game, they skewed the combat perameters and made just a bozo of a game.

It being even free it would be a waste of your emotional and mental resources to even play this.
Hard pass for anyone that is a lover of strategy. As there is none here.