The UI is pretty clever. It's a bit confusing at the beginning (especially the tutorial), but it quickly makes sense. I really like how the player is able to inspect the items while still being in action.
Overall, the game works great. There's a nice dynamic between the need to prevent errors, and the desire to make a better score. Especially at the end(s), when I was low on money. Actually an issue I could point out is that on my first try, I had the impression I was loosing because I had zero money left, and was losing stamina. I understood only then (with the "continue" button) that it was part of the game loop.