At it's current stage, the game lacks optimization for weaker hardware, the game also lacks directory, which makes it difficult to know where exactly you should be going and what you should be doing. Lack of tutorial at the beginning is also not good.
Edit: I know this is a demo, the demo is sweet otherwise! It does feel like a classic 2000's stealth game. I would love to see what this game evolves into once it's polished and finished!