Yes, that one is the correct link. I watch all the gameplay and I agree on adding more enemies, I will be working on that. About the difficulty of the game, that is a really tricky one to balance, I myself found the game extremely easy, in my eyes it doesn't have too much challenge, but when I see somebody on Youtube play my game, I realize that first time experiences may be really different.
For example, one guy played the game, and lose the round with Luna but then he tried Zelvy and win with the bombs, and the funny part is that he saw Zelvy's second skill (the spinning and throwing bombs) and he said it's kind of weak because why the player want to throw the bombs away. Meanwhile another person play with Zelvy and figured out that maxim bombs will allow him to "spin to win".
So my plan is making the first difficulty kind of easy and then the others options will be way harder, so they can have a reason to buy upgrades and rings upgrades which I will add on the EA.
Thank you for playing the demo, was fun hearing all the comments and reactions from the group.