Needs undo or a back button – Osmosis Solitaire Review

I've been playing this game with cards for more than 50 years, so I was happy to see the app. I'd recommend 2 improvements: 1) an undo or back button. Sometimes I go too fast and miss a move, so would be great to go back; 2) in the card game, once you've gone through a pile and have an empty space, you can take a card from one of the other piles, which opens the game up a bit. If a back button is added, I'd give it a 5 star rating. The other improvement would be gravy.
Review by Gchat fan on Osmosis Solitaire.