The demo is nearly finished, and there is 3 difficulty modes:
Easy: by default, this is the difficulty mode that is set. Not many enemies and should be good to practice on it.
In this mode, it should be possible to finish the demo after 3 to 5.
Normal: selectable in the options menu, this is more harder than easy while still being somewhat manageable. By today's standard, it is a very difficult mode.
Hard: This unleashes the full power of the shadow gangs, many enemies on the screen, and in their hardest variation (block more, and more advanced AI), very very very hard mode.
If you finish the demo in this mode, then hats off to you, a true anti Shadow Gangs hero.
I leave you with a new illustration showing the first mission boss, and for all people who awaits this game, thank you.