The Exodus demo looks and plays more like a proof of concept rather than a sample of an actual game that's well into its development, nothing yet has a feeling of coherency with problems arising in both gameplay, what little of it there is on display, and graphics.
The demo features an odd mix of 2d and 3d which doesn't quite work, the models just don't blend with the digitally-drawn scenery, which itself varies in quality from looking quite pretty to either unfinished or amateurish. Hazards don't really 'pop' from the rest of the graphics and particle effects seem oddly absent.
Controls are set oddly from the start, I have never experienced 'Q' and 'D' being used in place of WASD movement and the mouse is used to attack. Your alien hero has a melee move to fight off the various enemy creatures but it feels flimsy and weak, the character animation not yet at a state of feeling fluid and natural while you move and fight.
While it is vaguely interesting if you like to walk around sci-fi landscapes, there's not much of a game to be seen in this demo of Exodus, it all just feels a bit unfinished.