I love the idea of a solitaire roguelite, but the roguelite aspects overshadow the actual solitaire to the game's detriment. I don't mind that it's heavily RNG dependent, but it is very much designed to not allow you complete a run without using the (rather overpowered) permanent upgrades. The items purchased after every round offer a good variety of ways to play, but ultimately I don't think it has too much of an impact until round 10+. The gameplay loop is not helped by the early levels being very simple but take a long time, even with shortened animations. When it takes half an hour to get to any form of challenge on your second run, I don't think there's that much longevity. I also got to round 15 or so and was killed with full health and not understanding what killed me, so I lost a lot of my encouragement to continue.