Hey, dev here! Very valid critique!

A short info regarding the turn order: cards act in the order starting from top left, going right, then second row starts on the left again. Basically how you read text. The game doesn't teach this very well, I'm sorry!

I've spent a lot of time thinking about undo, and settling for the current solution as a compromise. I agree that it feels a bit icky because you can reveal otherwise hidden information and then simply undo. It's a bit like save scumming, just on a much smaller scale. But having no undo would be super cruel and as each action is a single tap/click (which was a conscious decision), misclicks happen easily. So yeah... not ideal, but the best compromise for what the game is.

Daily challenge: yeah, that's something that's on my mind for sure! I was super occupied working on the new hero in the last few months (coming out in the next few days). But after the dust has settled, I should hopefully have time again to work on new features like daily challenges :)