The game concept is good and has a lot of positive things going for it! The main character and everything shown thus far clearly demonstrates that the developer has love for his creation, and I felt it. On first blind playthrough, I played for 2 hours straight exploring the card combinations and doing my first mini boss fight! And I don't particularly spend too much time playing games nowadays, but it sucked me right in. The meticulousness of the card system is mechanically the most impressive for me in this game. I loved the ability to "fuse" cards to create a stronger card effect. The fun elements are there and the next step I believe is polish.
The game loop itself is solid. Fight and gain more cards/treasures for your deck, go for tougher battles, progress the game. It also has a mysterious and likeable main character that you control and a mysterious story character (Gerard) to egg you on in between battles and build the game lore. It has boss fights and other encounters to add flavor to the main loop.
The current visuals have the potential to be refined to create something great. It's got that "adventure with lots of heart" going for it. The game just needs more visual cohesion to carry things through to the deeper game sections, and a little bit more refinement in the UI. This is understandable since its a very early alpha which is intended for people to experience the game loop first and foremost and for the developer to check if the concept works and flesh things out further. The ingredients are already here in this early alpha. The developer clearly has put a lot of thought (and work) into what we're seeing now and has an apt view for what makes a compelling card game. It reminded me of the best I've played, like MTG and Legend of the Five Rings. I can see a great game after a few polish passes.
Can't wait to see how the development of this game progresses!