That's all just fine. If you can please all those people with your game, then more power to you. It's not impressing us, though. Whether anybody else likes it is irrelevant here. As for your question, I honestly can't tell you why some people like it. I don't know why anybody likes your game, but I wish I did. Instead, I would rephrase your question, "If it's so good, then how come we don't like it?" Well, I've already explained why I don't like it. It's up to you whether you try to improve your game based on the criticism you're receiving here or simply move on, content with pleasing the Youtube fanbase.
Also, don't bother telling us that the full release is any better. We all know just as well as you do that the full release doesn't exist. If it did, you would have uploaded that instead of the terribly flawed demo you currently link to. If you meant the full release will be better, that's another thing. You'll need to back that up by actually releasing something better, though.
I don't think I need to explain what I think about your minigame, you've probably already guessed it.