This is a nice idea, but it suffers from some issues of execution.
The UI has a lot of shifting components to it. Changing states changes the nature of the cards, which makes the outcome more clear at times, but with some of the arrows can be a bit confusing.
Additionally, those cards in the stack shift as you play them, I've frequently misplayed cards as a consequence. It's not apparently clear what the trade-off is in terms of selecting moves, you can tell you have a timer, but it's hard to know how your decisions directly affect your likelihood of success.
Finally, the cards are one of the most important elements of the UI, but they aren't distinguished and it's not immediately clear that the numerical hotkeys are how you activate them.