I have tested the demo a bit and the game is a bit confusing at the betting stage. For example, I click demo and then click play and I just watch... Like no idea whats going on or where I am or whats happening, literally no clue. I feel like there should be better UX that explains whats going on, surely I can't be the only one (or maybe I am the only idiot) but if you bring this demo to full stage release I am sure there will be a lot of people who doesn't understand how the game works so they would probably not even gamble here.
If you could make it more fool proof (which I am sure you think it is simple but remember you are the one that coded it so it looks simple to you but to a person who has no idea it doesn't look that easy) you could potentially have more customers.
In the demo version shows how the player enters the game and how to determine the winner, the player can not control the process of the game, the rules and the meaning of the game is very simple.