Concept is really creative and fun. I enjoy these kind of puzzles a lot. I think the animations and attention to polish is what really tied everything in for me. The card animations, the scrolling animation for the digits, and just how clean and professional the game feels makes this engaging.
The boss had its own music and animations and particles, it was very cool. With the amount of detail and polish in this game, I could tell you guys worked reeeally hard on this project.
Congrats!