Thanks so much, glad you enjoy! Yeah, auto-cascade is for automatically moving the remainder of a stack between the free-cells and the board, flipping ascending <--> descending (the gif in last dev log shows it better than I can explain).
I hear you about the auto-stacking, it definitely feels better when you're the one to notice the next card in the chain! That being said, I don't think we can easily add a toggle for that specific behaviour, cause the auto-stacking enforces a nuanced rule with "locking-in" stacks starting from A unless you have enough other free-cells to "unstack" yourself. It unfortunately wouldn't be easy to replicate with manual stacking, but I'll add it to the idea list in case we decide to add more games modes in the future x)