I'm guessing for your edit that you feel you're being downvoted for a negative comment about a cool demo. However, you're being downvoted for not giving any ac

I'm guessing for your edit that you feel you're being downvoted for a negative comment about a cool demo. However, you're being downvoted for not giving any actionable information, or even a screenshot; you're not making it possible for the author to make the project better, you're just making a valueless comment (and making it worse with your edit).