It has a slow start but after a while it got pretty fun! Once I hit like 8-10 level and got the ropes of each upgrade then at some point I stopped restarting the levels because the upgrades on the cards got dense enough to sort out most of the problems.
I've got quite far, I'm at level 26 rn and I didn't have to restart for a handful of levels now. But one upgrade in my opinion is pretty busted, the Suits Stacker. I took it every time it appeared and put it on the highest cards I could choose(highest because I had a problem with moving the kings around) and now it no longer looks like solitaire. I just sandwich other not upgraded cards of the same suit between the upgraded ones and create the "cursed stack" that can be easily manipulated and expanded even further with other suits.
My second favourite upgrade would be the Easy In but it still is not as powerful as the Suits Stacker.
So its pretty fun and relaxing to play in the off time, the only things I wished for while playing is some sort of hover info or a list of symbols of each upgrade since it took me a while to start recognizing all of them, also a way to take back a card could be useful as it sometimes just yoinked something I needed and an option to silence the music loop.