The beginning is good, but the game is so buggy at the beginning that I can't even get out of the beginning. As soon as you die at the beginning, the 4 Pokemon appear again because they block your path. I have my Pokemon and the items, but I can't trigger the sequence again, which means I have to start over. It can also happen that a fight is triggered in the grass, which causes the whole game to freeze. If that happens, you have to start the game over again because the 4 Pokemon block your path again.
Otherwise, the demo looks really good. But there's still a lot of room for improvement regarding such serious game bugs right at the beginning!