This game is fun when it works properly.
First, there's a bug that causes the order portion of the screen to go blank so you can't see what order you need to fill.
Second, it's an idle game so shouldn't you still progress when the app is closed? I mean, what's the point in upgrading auto-mining when you have to have the app open to earn anything? If you've got the app open you might as well be tapping.
Lastly, I've noticed that investments in apples or wine can disappear after having the app closed for a while. I invested in wine and closed the app. An hour later my shares in wine were gone, as was the money from the initial investment. I thought that maybe the game auto-sells the shares after a while but nope, everything was just gone!